Earphone

Abstract

The invention discloses an earphone, and the earphone comprises a sound production part, and the sound production part comprises a first housing which is used for forming a first accommodation cavity; the sound production assembly is arranged in the first containing cavity and comprises two loudspeakers, each loudspeaker comprises a vibrating diaphragm, the two loudspeakers are assembled and matched with each other in the axis direction so that a first acoustic cavity can be formed between the two loudspeakers, and the sound production assembly and the first shell are matched with each other; a first acoustic cavity is formed in the first shell, a second acoustic cavity isolated from the first acoustic cavity is formed between the sound production assembly and the first shell, the first shell is provided with a sound outlet hole communicated with the first acoustic cavity and a pressure relief hole communicated with the second acoustic cavity, and sound produced on one sides of vibrating diaphragms of the two loudspeakers is output through the first acoustic cavity and the sound outlet hole. And sound generated by the other sides of the vibrating diaphragms of the two loudspeakers is output through the second acoustic cavity and the pressure relief hole. In this way, the sound quality of the earphone can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic devices, and particularly to a headset. Background Art

[0002] Headsets have been widely used in people's daily lives and can be used in conjunction with electronic devices such as mobile phones and computers to provide a sound playback function for users. Among them, the earclip headset is a new type of headset. It is usually small in size and can be clipped on the wearer's helix for use. Moreover, the earclip headset does not block the ear canal, which can not only ensure safety in outdoor scenarios but also provide better wearing comfort compared to in-ear headsets.

[0003] However, the sound quality of current earclip headsets is difficult to meet the requirements. Summary of the Invention

[0004] The present application provides a headset, which includes a sound generating part. The sound generating part includes: a first housing for forming a first accommodation cavity; a sound generating assembly disposed in the first accommodation cavity. The sound generating assembly includes two speakers, and each speaker includes a diaphragm. The two speakers are assembled and cooperated with each other along the axial direction to form a first acoustic cavity between the two speakers. The sound generating assembly and the first housing cooperate with each other to form a second acoustic cavity isolated from the first acoustic cavity between the sound generating assembly and the first housing. The first housing is provided with a sound outlet hole communicating with the first acoustic cavity and a pressure relief hole communicating with the second acoustic cavity. The sound generated on one side of the diaphragms of the two speakers is output through the first acoustic cavity and the sound outlet hole, and the sound generated on the other side of the diaphragms of the two speakers is output through the second acoustic cavity and the pressure relief hole.

[0005] By providing two speakers in the sound generating assembly, the sound pressure level of the sound generating assembly can be effectively improved, thereby achieving a better volume effect, enabling the user to hear clearer sounds, and effectively improving the sound quality of the headset.

[0006] In some embodiments, the two speakers have the same acoustic characteristics and are coaxially arranged along the axial direction.

[0007] In some embodiments, the sound generating assembly further includes a mounting bracket, which is annularly arranged. The two speakers are respectively assembled and cooperated with the two ends of the mounting bracket to form the first acoustic cavity. The mounting bracket is provided with a first sound guiding hole communicating the sound outlet hole and the first acoustic cavity.

[0008] In some embodiments, the two speakers respectively include a voice coil, a magnetic circuit system, and a chassis. The chassis is used to support the diaphragm and the magnetic circuit system. The voice coil is connected to the diaphragm and is disposed in the magnetic field formed by the magnetic circuit system. The chassis of the two speakers are respectively assembled and cooperated with the mounting bracket.

[0009] In some embodiments, the two speakers respectively include voice coils, magnetic circuit systems, and chassis. The chassis is used to support the diaphragm and the magnetic circuit system. The voice coil is connected to the diaphragm and is disposed within the magnetic field formed by the magnetic circuit system. The chassis of the two speakers are assembled and cooperated with each other to form a first acoustic cavity. A first sound guiding hole communicating the sound outlet hole and the first acoustic cavity is disposed on the chassis of at least one of the two speakers.

[0010] In some embodiments, the sides of the diaphragms of the two speakers facing away from their respective magnetic circuit systems are adjacent to each other. The first acoustic cavity is formed between the diaphragms of the two speakers.

[0011] In some embodiments, the sound outlet hole and the first sound guiding hole communicate with each other along the radial direction of the sound generating assembly. The sound outlet hole and the first sound guiding hole are respectively arranged in a strip shape, and the length directions of the sound outlet hole and the first sound guiding hole are arranged along the circumferential direction of the sound generating assembly.

[0012] In some embodiments, the distance between the mounting edges of the diaphragms of the two speakers along the axial direction is between 1.6 and 2.5 mm, the radial dimension of the first acoustic cavity is between 7.5 and 9.5 mm, and the areas of the sound outlet hole and the first sound guiding hole are between 5 and 18 mm 2 。

[0013] In some embodiments, second sound guiding holes are respectively disposed on the chassis of the two speakers. The second sound guiding holes communicate the sides of the corresponding diaphragms facing their respective magnetic circuit systems with a second acoustic cavity.

[0014] In some embodiments, the sides of the diaphragms of the two speakers facing their respective magnetic circuit systems share a second acoustic cavity and a pressure relief hole.

[0015] In some embodiments, the second acoustic cavity includes two sub-acoustic cavities isolated from each other. The first housing is provided with pressure relief holes respectively communicating with each sub-acoustic cavity. The sides of the diaphragms of the two speakers facing their respective magnetic circuit systems respectively communicate with the corresponding sub-acoustic cavities and pressure relief holes.

[0016] In some embodiments, the number of the second sound guiding holes is multiple and they are arranged at intervals along the circumferential direction of the sound generating assembly. A pad is disposed on the chassis between two second sound guiding holes. The distance from some of the second sound guiding holes to the pressure relief hole is less than the distance from the pad to the pressure relief hole.

[0017] In some embodiments, the distance from some of the second sound guiding holes to the pressure relief hole is not greater than 0.5 mm.

[0018] In some embodiments, the second sound guiding hole closest to the pressure relief hole and the pad are arranged opposite to each other along the radial direction of the sound generating assembly.

[0019] In some embodiments, one end of the magnetic circuit system away from the respective diaphragm protrudes from the chassis, and the radial dimension of the protruding portion of the magnetic circuit system relative to the chassis is smaller than the radial dimension of the position where the chassis supports the diaphragm.

[0020] In some embodiments, the ratio of the axial dimension of the sound generating component to the radial dimension of the position where the chassis supports the diaphragm is between 0.8 and 1.3.

[0021] In some embodiments, the sound generating component is provided with mounting bosses, the first sound guiding holes are arranged on the mounting bosses, and the mounting bosses are in contact with the first housing around the sound outlet holes, so that the first sound guiding holes, the sound outlet holes and the second acoustic cavity are isolated from each other; alternatively, the first housing is provided with mounting bosses, the sound outlet holes are arranged on the mounting bosses, and the mounting bosses are in contact with the sound generating component around the first sound guiding holes, so that the first sound guiding holes, the sound outlet holes and the second acoustic cavity are isolated from each other.

[0022] In some embodiments, the sound generating component further includes a mounting bracket, the mounting bosses are located on the mounting bracket, the mounting bracket further includes a bracket main body that is circumferentially connected to the mounting bosses along the sound generating component and is arranged in an annular segment shape, the bracket main body is provided with two first supporting surfaces that face away from each other along the axial direction, the outer end surfaces of the two chassis on the side close to their respective diaphragms are respectively supported on the corresponding first supporting surfaces, and the mounting bosses protrude from the bracket main body along the axial direction and the radial direction of the sound generating component and are arranged outside the outer peripheral surfaces of the two chassis.

[0023] In some embodiments, the bracket main body includes a supporting portion and a limiting portion, the limiting portion is connected to the supporting portion, the first supporting surfaces are arranged on the supporting portion, the limiting portion protrudes from the first supporting surfaces along the axial direction and is embedded in the chassis to limit the chassis in the radial direction of the sound generating component; alternatively, the bracket main body is provided with a recessed portion, and a part of the chassis is embedded in the recessed portion to limit the chassis in the radial direction of the sound generating component.

[0024] In some embodiments, sealant is respectively provided between the outer end surfaces of the two chassis and the first supporting surfaces and between the inner peripheral surface of the mounting bosses and the outer peripheral surfaces of the two chassis.

[0025] In some embodiments, the chassis is provided with a first chamfer at the corner of the connection position between the outer peripheral surface close to the limiting portion and the first supporting surface to form a first glue receiving groove, and the supporting portion is provided with a second chamfer at the corner of the connection position between the outer end surface close to the chassis and the outer peripheral surface of the chassis to form a second glue receiving groove.

[0026] In some embodiments, the mounting bosses are provided with a third chamfer at the corner close to the outer peripheral surfaces of the two chassis to form a third glue receiving groove.

[0027] In some embodiments, the second chamfer and the third chamfer are connected to each other.

[0028] In some embodiments, the basin frame is further provided with a second support surface. The second support surface is located inside the outer end surface of the basin frame along the radial direction of the sound generating component, and is spaced from the outer end surface of the basin frame along the axial direction. The mounting edge of the diaphragm is supported on the second support surface, and at least a part of the projection of the limiting portion along the axial direction falls on the second support surface.

[0029] In some embodiments, the mounting bracket is a plastic molded part. The radial thickness of the mounting boss is between 0.2 and 0.7 mm. The mounting boss includes a connecting bridge disposed along the width direction of the first sound guiding hole and connecting the long side hole edge of the first sound guiding hole. The first sound guiding hole is divided by the connecting bridge into at least two first sub-sound guiding holes spaced from each other along the length direction of the first sound guiding hole.

[0030] In some embodiments, pads and sound guiding holes are respectively disposed on the two basin frames at intervals along the circumferential direction of the sound generating component. The sound guiding holes communicate the side of the corresponding diaphragm facing its respective magnetic circuit system with the second acoustic cavity; each basin frame and the mounting bracket are provided with a limiting structure that cooperates with each other. The limiting structure is used to limit the basin frame and the mounting bracket along the circumferential direction of the sound generating component. The limiting structures of the two basin frames are disposed opposite to each other along the axial direction, and the sound generating component has a radial plane disposed along the axial direction and passing through the limiting structure. The pads on each basin frame are mirror-symmetric with respect to the radial plane, and the sound guiding holes on each basin frame are respectively mirror-symmetric with respect to the radial plane.

[0031] In some embodiments, the earphone further includes an ear hook and an abutting portion. The ear hook connects the sound generating portion and the abutting portion. In the wearing state, the sound generating portion and the abutting portion form a clamping state on both sides of the user's earlobe, and the sound generating portion is located in the concha cavity. The first housing includes a first rigid housing and a second rigid housing. The first rigid housing is connected to the ear hook. The first rigid housing and the second rigid housing enclose a first accommodating cavity, and the sound outlet hole is disposed on the second rigid housing.

[0032] In some embodiments, the second rigid housing is provided with a convex block protruding from the end surface of the second rigid housing, and the first rigid housing is provided with a groove recessed from the end surface of the first rigid housing. The convex block is embedded in the groove, and the sound outlet hole is partially disposed on the convex block.

[0033] In some embodiments, the mounting boss is located on the second rigid housing or the sound generating component; a third support surface is disposed inside the first rigid housing. The third support surface is used to support the sound generating component so that when the first rigid housing and the second rigid housing are fixed to each other, the sound generating component and the second rigid housing abut against each other through the mounting boss.

[0034] In some embodiments, when the sound - generating component and the second rigid housing form an abutment through the mounting boss, there is a certain gap between the end face of the first rigid housing and the end face of the second rigid housing along the abutment direction of the sound - generating component and the second rigid housing.

[0035] In some embodiments, the axial direction is perpendicular to the abutment direction of the sound - generating component and the second rigid housing. The two speakers respectively include a voice coil, a magnetic circuit system, and a speaker frame. The speaker frame is used to support the diaphragm and the magnetic circuit system. The voice coil is connected to the diaphragm and is disposed within the magnetic field formed by the magnetic circuit system. The diaphragms of the two speakers are arranged adjacent to each other on the sides facing away from their respective magnetic circuit systems. The first acoustic cavity is formed between the diaphragms of the two speakers. The magnetic circuit system includes a magnetic shield protruding from the speaker frame and a magnet disposed within the magnetic shield. The third support table is configured to support the magnetic shields of the two speakers respectively.

[0036] In some embodiments, the earphone further includes an abutting portion and an ear hook. The ear hook connects the sound - generating portion and the abutting portion. In the wearing state, the sound - generating portion and the abutting portion form a clamping state on both sides of the user's earlobe, and the sound - generating portion is located within the concha cavity. The sound outlet hole and the pressure - relief hole are respectively mirror - symmetrically arranged with respect to a symmetry plane set along the length direction of the ear hook.

[0037] In some embodiments, on the symmetry plane, the minimum spacing distance between the sound outlet hole and the pressure - relief hole is between 6.5 and 10 mm.

[0038] In some embodiments, on the symmetry plane, the pressure - relief hole faces the earlobe, and the sound outlet hole and the pressure - relief hole are spaced from each other by the contact area between the first housing and the ear.

[0039] In some embodiments, the number of sound outlet holes is one and is arranged in a strip shape. The symmetry plane is set along the length direction of the sound outlet hole and is perpendicular to the axial direction.

[0040] In some embodiments, the number of pressure - relief holes is one and is arranged in a strip shape. The symmetry plane is set along the width direction of the pressure - relief hole and is perpendicular to the axial direction.

[0041] In some embodiments, the pressure - relief hole includes a first hole portion and a second hole portion along the length direction of the pressure - relief hole, and a third hole portion connecting the first hole portion and the second hole portion. The width of at least some positions of the first hole portion and the second hole portion is greater than the width of the third hole portion.

[0042] In some embodiments, the symmetry plane is the symmetry plane of the ear hook.

[0043] In some embodiments, the earphone further includes an ear hook and an abutting portion. The ear hook connects the sound generating portion and the abutting portion. In the worn state, the sound generating portion and the abutting portion form a clamping state on both sides of the user's auricle, and the sound generating portion is located in the concha cavity. The first housing includes a first rigid housing, a second rigid housing, and a first flexible body. The first rigid housing and the second rigid housing enclose a first accommodation cavity. The first flexible body is disposed on the outer wall of the second rigid housing and is used to contact the concha cavity. The plane of the outermost loop of the end face of the first flexible body is the first reference plane. The midpoint of the sound generating component along the axis or the axis of the sound generating component is located on the side of the first reference plane facing the first rigid housing and is parallel to the first reference plane.

[0044] In some embodiments, the distance from the midpoint of the sound generating component along the axis or the axis to the first reference plane is between 0.4 and 4 mm.

[0045] In some embodiments, the sound generating portion is configured to keep at least part of the ear canal open in the concha cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a schematic view of the worn state of the earphone according to an embodiment of the present application worn on a human ear;

[0047] Figure 2 is Figure 1 a front view schematic diagram of the structure of the earphone shown;

[0048] Figure 3 is Figure 1 a three-dimensional structure schematic diagram of the earphone shown;

[0049] Figure 4 is Figure 1 a top view schematic diagram of the structure of the earphone shown;

[0050] Figure 5 is Figure 1 a three-dimensional structure schematic diagram of the sound generating portion of the earphone shown;

[0051] Figure 6 is Figure 5 a front view schematic diagram of the structure of the sound generating portion shown;

[0052] Figure 7 is Figure 6 a cross-sectional structure schematic diagram of the sound generating portion shown along the cutting line A - A;

[0053] Figure 8 is Figure 6 another cross-sectional structure schematic diagram of the sound generating portion shown along the cutting line A - A;

[0054] Figure 9 is Figure 5 a top view schematic diagram of the structure of the sound generating portion shown;

[0055] Figure 10 is Figure 8 a schematic side view of the structure of the sound - generating component of the sound - generating part shown;

[0056] Figure 11 is Figure 10 a schematic cross - sectional structure view of the sound - generating component shown along the cutting line P - P;

[0057] Figure 12 is Figure 8 a schematic exploded view of the sound - generating component shown;

[0058] Figure 13 is Figure 8 a schematic three - dimensional structure view of another exemplary sound - generating component of the sound - generating part shown;

[0059] Figure 14 is Figure 11 an enlarged schematic view of the partial area Q of the sound - generating component shown;

[0060] Figure 15 is Figure 5 a schematic side view of the structure of the sound - generating part shown;

[0061] Figure 16 is Figure 15 a schematic cross - sectional structure view of the sound - generating part shown along the cutting line J - J;

[0062] Figure 17 is Figure 16 a schematic top - view of the structure of the sound - generating component of the sound - generating part shown;

[0063] Figure 18 is Figure 8 a schematic side - view of the structure of the sound - generating component of the sound - generating part shown on the other side;

[0064] Figure 19 is Figure 5 a schematic exploded view of the sound - generating part shown;

[0065] Figure 20 is Figure 5 a schematic exploded view of another structure of the sound - generating part shown;

[0066] Figure 21 is Figure 15 a schematic cross - sectional structure view of the sound - generating part shown along the cutting line U - U;

[0067] Figure 22 is Figure 15 another schematic view of the pressure - relief hole of the sound - generating part shown;

[0068] Figure 23 is Figure 5 yet another schematic exploded view of the sound - generating part shown;

[0069] Figure 24 is Figure 4 A schematic cross-sectional structure diagram of the earphone shown along the cutting line V-V;

[0070] Figure 25 is Figure 24 A schematic contour diagram of a cross-section corresponding to the cutting line V-V shown;

[0071] Figure 26 is Figure 1 A three-dimensional structure diagram of the earphone shown in a pre-tightening force state;

[0072] Figure 27 is Figure 26 A schematic diagram of the change in the clamping force of the earphone shown;

[0073] Figure 28 is Figure 26 A structural diagram of the earphone shown for measuring the pre-tightening force through a thin-film pressure sensor;

[0074] Figure 29 is Figure 26 A structural diagram of a measuring device for the clamping force / pre-tightening force of the earphone shown;

[0075] Figure 30 is Figure 26 A structural diagram of another measuring device for the clamping force / pre-tightening force of the earphone shown;

[0076] Figure 31 is Figure 1 A structural diagram of the earphone shown with a magnetic coupling matching structure;

[0077] Figure 32 is Figure 31 A schematic diagram of the change in the clamping force of the earphone shown;

[0078] Figure 33 is Figure 31 A schematic diagram of the change in the clamping force of the earphone shown in a pre-tightening force state;

[0079] Figure 34 is Figure 2 A schematic cross-sectional structure diagram of the earphone shown along the cutting line I-I;

[0080] Figure 35 is Figure 24 Another schematic contour diagram of a cross-section corresponding to the cutting line V-V shown;

[0081] Figure 36 is Figure 1 Another structural diagram of the earphone shown. Detailed implementation manners

[0082] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0083] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0084] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0085] like Figure 1 As shown, the user's ear EAR may include the external auditory canal E11, the cavum concha E12, the cymba concha E13, the triangular fossa E14, the antihelix E15, the scaphoid E16, the helix E17 and the antitragus E18. Among them, although the external auditory canal 101 has a certain depth and extends to the eardrum of the ear EAR, for the convenience of description, and in combination with Figure 1 As shown, in the present application, unless otherwise specified, the external auditory canal E01 specifically refers to its entrance away from the tympanic membrane (i.e., the ear hole). Furthermore, the concha cavity E12, the hymena concha E13, the triangular fossa E14 and other physiological parts have a certain volume and depth; and the concha cavity E12 is directly connected to the external auditory canal E11, that is, the ear hole can be simply regarded as being located at the bottom of the concha cavity E12.

[0086] Further, there is also a tragus E19 on the periphery of the external auditory canal of the ear EAR. Compared with parts such as the concha cavity E12, the concha cymba E13, and the triangular fossa E14, these parts have a certain depth and volume in three-dimensional space, that is, these parts are respectively recessed backward along the direction close to the user's head towards the rear side of the ear EAR, while the tragus E19 protrudes forward along the direction away from the user's head towards the front side of the ear EAR. Among them, "the front side of the ear EAR" is a concept relative to "the rear side of the ear EAR". The former refers to the side of the ear EAR away from the head. For example Figure 1 , the latter refers to the side of the ear EAR towards the head, and both are for the user's ear EAR.

[0087] Further, different users may have individual differences, resulting in different sizes such as shapes and sizes of the ear EAR. For the convenience of description and to reduce (even eliminate) the individual differences of different users, a simulator including a head and its (left and right) ears EAR can be made based on the ANSI:S3.36, S3.25, and IEC:603187 standards, such as GRAS45BCKEMAR. Therefore, descriptions such as "the user wears the earphone", "the earphone is in a worn state", and "in the worn state" can refer to the earphone described in this application being worn on the ear EAR of the aforementioned simulator. Of course, precisely because different users have individual differences, there may be certain differences when the earphone is worn by different users compared to when the earphone is worn on the ear EAR of the aforementioned simulator, but such differences should be tolerated.

[0088] This application embodiment describes at least one exemplary structure of the earphone 1. As Figure 1 shown, Figure 1 shows the state of the earphone 1 worn on the user's ear EAR. The earphone 1 can be a clip-on earphone. As Figures 1 to 4 shown, the earphone 1 includes a sound generating part 100 for inserting into the concha cavity E12 of the user (user), a contact part 400 for contacting the back of the user's ear, and an ear hook 300 connecting the sound generating part 100 and the contact part 400. The ear hook 200 can bypass the user's helix 17, and the sound generating part 100 and the contact part 400 form a clamping state on both sides of the user's helix. The sound generating part 100 is a sound playback device, which is used to convert an electrical signal into a sound signal and play it to the wearer. The contact part 400 forms a clamping state with the sound generating part 100 to clamp and wear the entire earphone 1 on the user's helix. In some embodiments, devices such as a battery and a circuit board can be arranged inside the contact part 400. Of course, the contact part 400 can also be used without a battery, and the battery can be installed in the sound generating part 100.

[0089] In some embodiments, as Figure 5 and Figure 6As shown, the sound - generating part 100 may be provided with a sound - emitting hole 111 and a pressure - relief hole 112. The sound - emitting hole 111 may be located at the bottom of the sound - generating part 100, and the pressure - relief hole 112 may be located on the side of the sound - generating part 100 close to the earhook 300. As Figure 7 As shown, the sound - generating part 100 includes a first housing 10 and a sound - generating component 20. The first housing 10 is used to form a first accommodating cavity 110, and the sound - generating component 20 is disposed in the first accommodating cavity 110.

[0090] As Figure 7 As shown, the sound - generating component 20 includes two speakers 21. Each speaker 21 includes a diaphragm 22. The two speakers 21 are assembled and cooperated with each other along the axial direction (i.e., the direction of the axis Z) to form a first acoustic cavity 201 between the two speakers 21. The sound - generating component 20 and the first housing 10 cooperate with each other to form a second acoustic cavity 202 that is isolated from the first acoustic cavity 201 between the sound - generating component 20 and the first housing 10. The first housing 10 is provided with a sound - emitting hole 111 communicating with the first acoustic cavity 201 and a pressure - relief hole 112 communicating with the second acoustic cavity 202. The sound generated on one side of the diaphragms 22 of the two speakers 21 is output through the first acoustic cavity 201 and the sound - emitting hole 111, and the sound generated on the other side of the diaphragms 22 of the two speakers 21 is output through the second acoustic cavity 202 and the pressure - relief hole 112. Among them, the axial direction may be the direction indicated by the central axis Z of the sound - generating component 20. The central axis Z may, for example, pass through the geometric center of the sound - generating component 20 and the geometric centers of the diaphragms 22 of the two speakers 21. The central axis Z may also be the central axis of the magnetic circuits of the two speakers 21.

[0091] For the speaker 21 used to generate sound, the sound pressure level is an important parameter to measure its performance. The sound pressure level is usually used to compare the sound pressure levels emitted by different sound sources and is used to quantify and compare the intensity of sounds. The sound pressure level is a measure used to describe the size of a sound. It represents the logarithm of the ratio of the effective value of the sound pressure to its reference value. The specific formula is as follows:

[0092]

[0093] Among them, SPL is the sound pressure level, P is the sound pressure generated when the speaker 21 is working, and Pref is the reference sound pressure. When the sound - generating component 20 is provided with only a single speaker 21, the sound pressure generated when it is working is P. Under the same conditions, when two speakers 21 are provided in the sound - generating component 20, the sound pressure generated when it is working is 2P. Then, according to the above formula, the difference in the sound pressure level between a single speaker 21 and two speakers 21 can be calculated as follows:

[0094]

[0095] As can be derived from the above, compared with only setting one speaker 21, by assembling and mating along the axial direction (i.e., the direction of axis Z) within the sound generating component 20 and forming a first acoustic cavity 201 between the two speakers to produce sound, the sound pressure level of the sound generating component 20 can be effectively improved, thereby achieving a better volume effect, enabling the user to hear clearer sound, and effectively improving the sound quality of the earphone 1.

[0096] In addition, through the assembly and mating of the two speakers 21, the diaphragms 22 of the two speakers 21 can face each other to form a first acoustic cavity 201. The first acoustic cavity 201 is a place where the diaphragms 22 vibrate to push air to generate sound waves for the user to listen to. The second acoustic cavity 202 is connected to the pressure relief hole 112 and then to the outside world, and is used to balance the air pressure inside the first housing 10. The assembly and mating of the two speakers 21 can form the first acoustic cavity 201. After the two speakers 21 are assembled, they are integrally assembled in the first housing 10, which can simplify the structure and the assembly is simple. Moreover, by using the second acoustic cavity 202 formed between the sound generating component 20 and the first housing 10 and being isolated from the first acoustic cavity 201, there is no need to form the second acoustic cavity 202 through additional structures or devices, which can also simplify the structure, reduce the assembly difficulty of the earphone 1, and improve the assembly efficiency of the earphone 1.

[0097] Optionally, the two speakers 21 of the sound generating component 20 have the same acoustic characteristics and are coaxially arranged along the axial direction (i.e., the direction of axis Z). Among them, the same acoustic characteristics of the two speakers 21 means that under the drive of the same drive signal, the sound pressures generated by the two speakers 21 are the same or close. Specifically, the ratio of the difference in sound pressure between the two to the minimum sound pressure is not greater than 10%. By setting two speakers 21 with the same acoustic characteristics and coaxially arranging them along the axial direction (i.e., the direction of axis Z), it is beneficial to improve the sound quality of the sound generating component 20.

[0098] Optionally, as Figure 7 shown, the sound generating component 20 further includes a mounting bracket 27. The mounting bracket 27 is annularly arranged. The two speakers 21 are respectively assembled and mated with both ends of the mounting bracket 27 to form a first acoustic cavity 201. The mounting bracket 27 is provided with a first sound guiding hole 203 that connects the sound outlet hole 111 and the first acoustic cavity 201.

[0099] By setting the annular mounting bracket 27, while realizing the assembly and mating of the two speakers 21, the first acoustic cavity 201 is formed, and the first sound guiding hole 203 is provided on the mounting bracket 27 to realize the connection between the sound outlet hole 111 and the first acoustic cavity 201, so as to realize the transmission of the sound waves in the first acoustic cavity 201 to the user's ear EAR through the first sound guiding hole 203 and the sound outlet hole 111 in sequence, effectively simplifying the structure, effectively improving the structural compactness and integration of the sound generating component 20, being beneficial to reducing the assembly difficulty, and being beneficial to improving the assembly efficiency.

[0100] Optionally, in some embodiments, as Figure 7 shown, the two speakers 21 respectively include a voice coil 23, a magnetic circuit system 24, and a chassis 25. The chassis 25 is used to support the diaphragm 22 and the magnetic circuit system 24. The voice coil 23 is connected to the diaphragm 22 and is disposed within the magnetic field formed by the magnetic circuit system 24. The chassis 25 of the two speakers 21 are respectively assembled and cooperated with the mounting bracket 27, so that a first acoustic cavity 201 is formed between the diaphragms 22 of the two speakers 21 and the mounting bracket 27. Among them, the voice coil 23 can be cylindrical, and the axis of the voice coil 23 can be the central axis Z of the sound generating component 20. The voice coil 23 moves in the axial direction (i.e., the direction of the axis Z) under the action of the magnetic field formed by the magnetic circuit system 24 to drive the diaphragm 22 to vibrate and generate sound waves.

[0101] By assembling and cooperating the chassis 25 of the two speakers 21 with the mounting bracket 27 to realize the assembly of the sound generating component 20, and setting the chassis 25 to support the diaphragm 22 and the magnetic circuit system 24, the structure is simple and compact, effectively reducing the assembly difficulty and effectively improving the assembly efficiency.

[0102] Figure 7 Shown is the assembly and cooperation of the chassis 25 of the two speakers 21 and the mounting bracket 27. Optionally, in some embodiments, the mounting bracket 27 can also be cancelled, and the chassis 25 of the two speakers 21 can be assembled and cooperated with each other to form the first acoustic cavity 201. In this case, a first sound guiding hole 203 communicating the sound outlet hole 111 and the first acoustic cavity 201 is provided on the chassis 25 of at least one of the two speakers 21. For example, the two chassis 25 can both be provided with the sound outlet hole 111, or each is provided with a part of the sound outlet hole 111, and a complete sound outlet hole 111 is formed after assembly. Through the assembly and cooperation between the two chassis 25, the assembly and cooperation of the two speakers 21 and the formation of the first acoustic cavity 201 are realized, without the need to additionally provide connecting components, while simplifying the structure and reducing the production cost, which is beneficial to reducing the assembly difficulty and improving the assembly efficiency.

[0103] Optionally, as Figure 7 shown, the sides of the diaphragms 22 of the two speakers 21 facing away from their respective magnetic circuit systems 24 are adjacent to each other, and the first acoustic cavity 201 is formed between the diaphragms 22 of the two speakers 21.

[0104] The diaphragms 22 of the two speakers 21 are driven by their respective voice coils 23 to vibrate, so as to generate sound waves for the user to listen to on the side facing away from their respective magnetic circuit systems 24. By arranging the sides of the diaphragms 22 of the two speakers 21 facing away from their respective magnetic circuit systems 24 adjacent to each other, both speakers 21 generate sound waves in the first acoustic cavity 201. While effectively simplifying the structure of the sound generating component 20, it is convenient to reduce the volume of the first acoustic cavity 201, making the structure of the sound generating component 20 more compact, which is beneficial to reducing the volume of the earphone 1 and improving the wearing comfort of the earphone 1. In addition, the two speakers 21 sharing the first acoustic cavity 201 can also shift the resonance peak of the first acoustic cavity 201 towards the high frequency, which is beneficial to improving the sound quality of the earphone 1.

[0105] As Figure 7 shown, second sound guiding holes 204 are respectively arranged on the speaker frames 25 of the two speakers 21. The second sound guiding holes 204 communicate the sides of the corresponding diaphragms 22 facing their respective magnetic circuit systems 24 with the second acoustic cavity 202.

[0106] The sides of the diaphragms 22 of the two speakers 21 facing their respective magnetic circuit systems 24 are communicated with the second acoustic cavity 202 through the second sound guiding holes 204, and then communicated with the outside through the pressure relief holes 112 to balance the air pressure inside the first housing 10. While ensuring the sound quality, it is beneficial to simplify the structure of the sound generating component 20 and facilitate assembly.

[0107] Optionally, in some embodiments, as Figure 7 shown, the sides of the diaphragms 22 of the two speakers 21 facing their respective magnetic circuit systems 24 share the second acoustic cavity 202 and the pressure relief holes 112. Such an arrangement can reduce the number of pressure relief holes 112, improve the aesthetics of the earphone 1, and is beneficial to ensuring the consistency of the acoustic characteristics of the two speakers 21, which is beneficial to improving the sound quality of the sound generating component 20. In addition, the two speakers 21 sharing the second acoustic cavity 202 is also convenient for sealing, and can reduce the volume of the first housing 10, making the structure of the earphone 1 more compact, effectively reducing the volume of the earphone 1, and being beneficial to improving the wearing comfort of the earphone 1.

[0108] Optionally, in some other embodiments, as Figure 8As shown, the second acoustic cavity 202 includes two sub-acoustic cavities 202a isolated from each other. The first housing 10 is provided with pressure relief holes 112 respectively communicating with each sub-acoustic cavity 202a. The diaphragms 22 of the two speakers 21 communicate with the corresponding sub-acoustic cavities 202a and pressure relief holes 112 respectively on one side facing their respective magnetic circuit systems 24. By isolating the two sub-acoustic cavities 202a, the sound signals of the two speakers 21 can be made not completely the same, enabling the earphone 1 to have a certain frequency division function to adapt to different listening environments and sound quality requirements. Moreover, the two isolated sub-acoustic cavities 202a can reduce the mutual interference between the two speakers 21, thereby improving the effectiveness and reliability of the operation of the two speakers 21, which is beneficial to improving the sound quality of the earphone 1.

[0109] Optionally, as Figure 9 and Figure 10 shown, the sound outlet hole 111 and the first sound guiding hole 203 communicate with each other along the radial direction RD of the sound generating assembly 20. The sound outlet hole 111 and the first sound guiding hole 203 are respectively arranged in a strip shape, and the length directions of the sound outlet hole 111 and the first sound guiding hole 203 are arranged along the circumferential direction of the sound generating assembly 20. Among them, the radial direction RD of the sound generating assembly 20 is the direction perpendicular to the axis direction (i.e., the direction of the axis Z), and the circumferential direction of the sound generating assembly 20 is the direction surrounding the axis direction (i.e., the direction of the axis Z).

[0110] By arranging the sound outlet hole 111 and the first sound guiding hole 203 in a strip shape and making the length directions of the sound outlet hole 111 and the first sound guiding hole 203 along the circumferential direction of the sound generating assembly 20, while ensuring the areas of the sound outlet hole 111 and the first sound guiding hole 203, the lengths of the sound outlet hole 111 and the first sound guiding hole 203 in the axis direction (i.e., the direction of the axis Z) are reduced, the structural compactness of the sound generating assembly 20 is improved, the volume of the earphone 1 is reduced, and the wearing comfort of the earphone 1 is improved.

[0111] In this application, the description of a certain physical / mathematical quantity (such as distance, ratio, area, length, width, thickness, etc.) being between a certain numerical range may include the endpoint values of the numerical range. For example, if a certain distance is between A and B, the value of this distance can be A, can be B, or can also be a value between A and B. Therefore, the descriptions in the following content involving "between" numerical ranges are understood and applied according to the above expressions.

[0112] Optionally, as Figure 11As shown, the spacing distance Z22 of the mounting edges of the diaphragms 22 of the two speakers 21 in the axial direction (i.e., the direction of the axis Z) is between 1.6 and 2.5 mm. For example, it can be 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, etc. Of course, it can also be other values. The mounting edge of the diaphragm 22 is the edge mounted on the chassis 25. The radial dimension R21 of the first acoustic cavity 201 is between 7.5 and 9.5 mm. For example, it can be 7.8 mm, 8.1 mm, 8.5 mm, 8.8 mm, 9.1 mm, etc. Of course, it can also be other values. Optionally, the areas of the sound outlet hole 111 and the first sound guiding hole 203 can be between 5 and 18 mm 2 . Optionally, the areas of the sound outlet hole 111 and the first sound guiding hole 203 can be between 9 and 20 mm 2 . For example, the areas of the sound outlet hole 111 and the first sound guiding hole 203 can be 6 mm 2 , 8 mm 2 , 9 mm 2 , 10 mm 2 , 12 mm 2 , 14 mm 2 , 17 mm 2 , 19 mm 2 etc. Of course, it can also be other values. By reasonably setting the above dimensions, while improving the structural compactness of the sound generating component 20, the resonance peak of the first acoustic cavity 201 can be shifted to a higher frequency, which is beneficial to improving the sound quality of the earphone 1.

[0113] Optionally, as Figure 11 shown, the ends of the magnetic circuit systems 24 facing away from their respective diaphragms 22 protrude from the chassis 25, and the radial dimension R22 of the protruding part of the magnetic circuit systems 24 relative to the chassis 25 is smaller than the radial dimension R23 of the support position of the chassis 25 for the diaphragm 22. Such a setting can make the outer contour of the sound generating component 20 closer to a spherical shape, which is convenient for improving the structural compactness and integration, and effectively reduces the volume of the sound generating component 20. And the first accommodation cavity 110 can be set to be approximately spherical to match the appearance of the earphone 1. Thus, setting the sound generating component 20 in this way is convenient for assembling the sound generating component 20 into the first accommodation cavity 110, effectively improving the space utilization rate of the first accommodation cavity 110 and effectively improving the assembly efficiency of the earphone 1. In addition, by setting the outer contour of the sound generating component 20 to be closer to a spherical shape, it is more suitable for the shape of the concha cavity E12, and then the space in the concha cavity E12 can be fully utilized, effectively improving the space utilization rate in the concha cavity E12.

[0114] Optionally, as Figure 11As shown, the ratio of the axial dimension Z21 of the sound - generating component 20 to the radial dimension R23 of the supporting position of the diaphragm 22 by the chassis 25 is between 0.8 and 1.3. For example, this ratio can be 0.9, 1, 1.1, etc. Optionally, the ratio of the maximum axial dimension Z21 to the maximum radial dimension R20 of the sound - generating component 20 is between 0.8 and 1.3 mm, and this ratio can be 0.9, 1, 1.1, etc. In this way, the axial dimension Z21 of the sound - generating component 20 and the radial dimension R23 of the supporting position of the diaphragm 22 by the chassis 25 are very close, making the outer contour of the sound - generating component 20 closer to a spherical shape, facilitating better cooperation with the approximately spherical first accommodation cavity 110, effectively improving the space utilization rate of the first accommodation cavity 110, effectively reducing the assembly difficulty and improving the assembly efficiency. For example, if the axial dimension Z21 of the sound - generating component 20 is 9.5 mm and the radial dimension R23 of the supporting position of the diaphragm 22 by the chassis 25 is 8.1 mm, then the ratio between the two is approximately 1.17. Another example, if the axial dimension Z21 of the sound - generating component 20 is 9.5 mm and the radial dimension R23 of the supporting position of the diaphragm 22 by the chassis 25 is 8.8 mm, then the ratio between the two is approximately 1.08.

[0115] Optionally, in some embodiments, as Figure 11 and Figure 12 shown, the sound - generating component 20 is provided with a mounting boss 271, the first sound - guiding hole 203 is arranged on the mounting boss 271, and the mounting boss 271 abuts against the first housing 10 around the sound - emitting hole 111 (as Figure 7 shown), so that the first sound - guiding hole 203, the sound - emitting hole 111 and the second acoustic cavity 202 are isolated from each other. Of course, in some other embodiments, the mounting boss 271 is also arranged on the first housing 10 instead of on the sound - generating component 20. Specifically, the first housing 10 is provided with a mounting boss 271, the sound - emitting hole 111 is arranged on the mounting boss 271, and the mounting boss 271 abuts against the sound - generating component 20 around the first sound - guiding hole 203, so that the first sound - guiding hole 203, the sound - emitting hole 111 and the second acoustic cavity 202 are isolated from each other.

[0116] By providing the mounting boss 271, while realizing the connection between the first housing 10 and the sound - generating component 20, the first sound - guiding hole 203 and the sound - emitting hole 111 are isolated from the second acoustic cavity 202. While simplifying the structure, the isolation effect is improved, avoiding the influence of the sound output from the first sound - guiding hole 203 and the sound - emitting hole 111 being affected by the pressure relief of the second acoustic cavity 202 through the pressure - relief hole 112, and improving the sound quality of the earphone 1.

[0117] Optionally, as Figure 11 and Figure 12As shown, the sound generating component 20 further includes a mounting bracket 27, and a mounting boss 271 is located on the mounting bracket 27. The mounting bracket 27 further includes a bracket main body 272 that is circumferentially connected to the mounting boss 271 along the sound generating component 20 and is arranged in an annular segment shape. Two first support surfaces 2701 that face away from each other in the axial direction (i.e., the direction of axis Z) are provided on the bracket main body 272. The outer end surfaces 250 of the two basin frames 25 close to the respective vibration membranes 22 are respectively supported on the corresponding first support surfaces 2701. The mounting boss 271 protrudes from the bracket main body 272 in the axial direction (i.e., the direction of axis Z) and the radial direction RD of the sound generating component 20, and is arranged outside the outer peripheral surfaces of the two basin frames 25. With such a setting, while ensuring the structural strength of the mounting boss 271, sufficient space can be reserved for the mounting boss 271 to set the first sound guiding hole 203, and the two basin frames 25 are respectively supported on the corresponding first support surfaces 2701, which can improve the stability of the structure, thereby effectively improving the stability and reliability of the overall structure of the sound generating component 20.

[0118] Optionally, as Figure 10 and Figure 12 shown, the mounting bracket 27 can be a plastic molded part, and the radial thickness R24 of the mounting boss 271 is between 0.2 and 0.7 mm. Optionally, the radial thickness R24 of the mounting boss 271 can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc. Of course, it can also be other values. The mounting boss 271 includes a connecting bridge 2723 that is arranged along the width direction of the first sound guiding hole 203 and connects the long side hole edge 111c of the first sound guiding hole 203. The first sound guiding hole 203 is divided by the connecting bridge 2723 into at least two first sub-sound guiding holes that are spaced from each other along the length direction of the first sound guiding hole 203. The mounting bracket 27 can be, for example, injection molded, compression molded, etc. Of course, it can also be made by other molding methods. Of course, in some other embodiments, as Figure 13 shown, the connecting bridge 2723 can also not be provided on the mounting boss 271, so that a first sound guiding hole 203 with a larger area can be obtained. Relative to Figure 12 the example shown, Figure 13 the circumferential dimension of the first sound guiding hole 203 of

[0119] can be appropriately reduced to maintain the structural strength, but since the connecting bridge 2723 is cancelled, the area of the first sound guiding hole 203 can still be increased, thereby improving the sound quality. By reasonably setting the radial thickness R24 of the mounting boss 271, while ensuring the space of the first sound guiding hole 203, the radial dimension R20 of the sound generating component 20 is not excessively increased, so as to realize the miniaturization of the overall earphone 1. The setting of the connecting bridge 2723 facilitates the molding of the mounting bracket 27 and effectively improves the connection strength of the mounting boss 271, thereby effectively improving the effectiveness and reliability of the operation of the sound generating component 20.

[0120] Optionally, in some embodiments, as Figure 11 and 12 shown, the bracket body 272 includes a support portion 2721 and a limiting portion 2722. The limiting portion 2722 is connected to the support portion 2721. The first support table surface 2701 is disposed on the support portion 2721. The limiting portion 2722 protrudes from the first support table surface 2701 along the axial direction (i.e., the direction of axis Z) and is embedded in the basin frame 25 to limit the basin frame 25 in the radial direction RD of the sound generating assembly 20.

[0121] Of course, in some other embodiments, the bracket body 272 may be provided with a recessed portion (not shown in the figure). In other words, the limiting portion 2722 is not protruded but recessed, thereby forming a recessed portion. A part of the basin frame 25 is embedded in the recessed portion to limit the basin frame 25 in the radial direction RD of the sound generating assembly 20.

[0122] By providing the limiting portion 2722 or the recessed portion to limit the basin frame 25 in the radial direction RD of the sound generating assembly 20, the structure is simple and stable, which is convenient for assembly and disassembly, and while effectively improving the structural stability of the sound generating assembly 20, the assembly efficiency is also improved.

[0123] Optionally, as Figure 11 and Figure 12 shown, sealing glue 28 is respectively provided between the outer end surfaces 250 of the two basin frames 25 and the first support table surface 2701, and between the inner peripheral surface of the mounting boss 271 and the outer peripheral surfaces of the two basin frames 25. By providing the sealing glue 28 at the above positions, the isolation effect of the first acoustic cavity 201 can be effectively improved, thereby improving the sound quality of the earphone 1. Moreover, the sealing glue 28 has good elasticity, and when assembling and connecting the mounting boss 271 and the first housing 10, the sealing glue 28 can undergo a certain elastic deformation to make it more fitting, thereby improving the stability and sealing performance of the connection between the mounting boss 271 and the first housing 10, which is beneficial to improving the sound quality of the earphone 1.

[0124] Optionally, as Figure 11 and Figure 14 shown, a first chamfer 251 is provided at the corner of the connection position between the outer peripheral surface of the basin frame 25 near the limiting portion 2722 and the first support table surface 2701 to form a first glue receiving groove 252. A second chamfer 2702 is provided at the corner of the connection position between the support portion 2721 near the outer end surface 250 of the basin frame 25 and the outer peripheral surface of the basin frame 25 to form a second glue receiving groove 2703.

[0125] By setting the first chamfer 251 and the second chamfer 2702 to form a first glue storage groove 252 and a second glue storage groove 2703, the accommodation capacity of the sealant 28 can be effectively increased, while improving the sealing effect and isolation effect, effectively reducing the overflow of the glue, thereby effectively reducing the possibility of interference with other components, which is beneficial to reducing the assembly difficulty.

[0126] Optionally, as Figure 11 shown, the mounting boss 271 is provided with a third chamfer 2704 at the corner near the outer peripheral surface of the two speaker frames 25 to form a third glue storage groove 2705. The setting of the third chamfer 2704 can further improve the glue accommodation capacity and the isolation effect of the first acoustic cavity 201. Optionally, the second chamfer 2702 and the third chamfer 2704 are connected to each other, so that the second glue storage groove 2703 formed by the second chamfer 2702 and the third glue storage groove 2705 formed by the third chamfer 2704 can communicate with each other, and then continuous coating can be carried out during glue application, effectively simplifying the process and improving the assembly efficiency.

[0127] Optionally, as Figure 11 and Figure 14 shown, the speaker frame 25 is further provided with a second support table surface 253. The second support table surface 253 is located inside the outer end surface 250 of the speaker frame 25 along the radial direction RD of the sound generating component 20, and is spaced from the outer end surface 250 of the speaker frame 25 along the axial direction (i.e., the direction of the axis Z). The mounting edge of the diaphragm 22 is supported on the second support table surface 253, and at least a part of the projection of the limiting portion 2722 along the axial direction (i.e., the direction of the axis Z) falls on the second support table surface 253.

[0128] By setting the second support table surface 253 to support the diaphragm 22, and the second support table surface 253 is located inside the outer end surface 250 of the speaker frame 25 along the radial direction RD of the sound generating component 20, it is beneficial to improve the connection stability of the diaphragm 22, thereby improving the reliability of the diaphragm 22 during operation. And the limiting portion 2722 is set so that at least a part of the projection along the axial direction (i.e., the direction of the axis Z) falls on the second support table surface 253, realizing the reasonable utilization of space, improving the space utilization rate, and being beneficial to increasing the size of the first acoustic cavity 201 in the radial direction RD of the sound generating component 20 while ensuring the connection stability, thereby being beneficial to improving the sound quality of the earphone 1.

[0129] Optionally, as Figures 15 to 17As shown, the number of the second sound guiding holes 204 is multiple and they are arranged at intervals along the circumferential direction of the sound generating component 20. A pad 26 located between two second sound guiding holes 204 is arranged on the chassis 25. The distance from some of the second sound guiding holes 204 to the pressure relief hole 112 is less than the distance from the pad 26 to the pressure relief hole 112. The pad 26 is used to receive an electrical signal so that the speaker 21 performs corresponding work. By arranging multiple second sound guiding holes 204 along the circumferential direction of the sound generating component 20, the acoustic path of the sound output through the pressure relief hole 112 can be shortened, which is beneficial to improving the utilization rate of the volume of the second acoustic cavity 202, beneficial to improving the pressure relief efficiency, and beneficial to the sound quality of the earphone 1. Figure 15 The cross-section corresponding to the cutting line U-U shown is the reference cross-section SF.

[0130] Optionally, the distance from some of the second sound guiding holes 204 to the pressure relief hole 112 is not greater than 0.5 mm. Further optionally, this distance is not greater than 0.3 mm. If the distance from the second sound guiding hole 204 to the pressure relief hole 112 is too large, it will lead to a decrease in the pressure relief performance, thereby affecting the sound quality of the earphone 1. By reasonably setting the distance from some of the second sound guiding holes 204 to the pressure relief hole 112, the pressure relief efficiency is effectively improved, which is beneficial to improving the sound quality of the earphone 1.

[0131] Optionally, as Figure 16 shown, the second sound guiding hole 204 closest to the pressure relief hole 112 and the pad 26 are arranged opposite to each other along the radial direction RD of the sound generating component 20. Such an arrangement can make the work of the pad 26 and the pressure relief work of the earphone 1 not interfere with each other, which is beneficial to improving the pressure relief performance of the earphone 1 and beneficial to improving the sound quality of the earphone 1.

[0132] As Figure 16 and Figure 17 shown, specifically, pads 26 and second sound guiding holes 204 are respectively arranged on two chassis 25 at intervals along the circumferential direction of the sound generating component 20. As Figure 12 and Figure 18 shown, each chassis 25 and the mounting bracket 27 are provided with limiting structures 200a, 200b that cooperate with each other. The limiting structures 200a, 200b are used to limit the chassis 25 and the mounting bracket 27 along the circumferential direction of the sound generating component 20. The limiting structures 200a, 200b of the two chassis 25 are arranged opposite to each other along the axial direction (i.e., the direction of the axis Z). Optionally, as Figure 17 and Figure 18 shown, the sound generating component 20 has a radial plane RF arranged along the axial direction (i.e., the direction of the axis Z) and passing through the limiting structures 200a, 200b. The pads 26 on each chassis 25 are arranged in a mirror image with respect to the radial plane RF, and the sound guiding holes on each chassis 25 are respectively arranged in mirror symmetry with respect to the radial plane RF.

[0133] The limiting structures 200a and 200b are used to limit the two basin frames 25 circumferentially along the sound generating component 20, preventing relative rotation between the two speakers 21, and effectively improving the structural stability and reliability of the sound generating component 20. At the same time, by mirroring the pads 26 and the second sound guiding holes 204 on each basin frame 25 with respect to the radial plane RF respectively, the directivities of the pads 26 and the second sound guiding holes 204 on the two basin frames 25 are made consistent, thereby improving the consistency of the acoustic characteristics of the two speakers 21 in the first accommodation cavity 110, which is beneficial to improving the sound quality of the earphone 1. In addition, by designing the structures of the two basin frames 25 to have high consistency, the two speakers 21 can reuse the same basin frame 25 design, effectively reducing the material cost and production cost.

[0134] Optionally, the number of the limiting structures 200a and 200b is only one set. With such a setting, while making the basin frame 25 mirror-symmetrical with respect to the radial plane RF, when the two basin frames 25 are installed, the sides with the limiting structures 200a are installed opposite to each other. Then, the pads 26 on each basin frame 25 are also relatively arranged and located on the same side of the sound generating component 20, further making the directivities of the pads 26 on the two speakers 21 consistent, thereby improving the consistency of the acoustic characteristics of the two speakers 21 in the first accommodation cavity 110, which is beneficial to improving the sound quality of the earphone 1.

[0135] Optionally, in combination with Figure 7 , Figure 19 and Figure 20 , the first housing 10 may include a first rigid housing 11 and a second rigid housing 12. The first rigid housing 11 is connected to the earhook 300. The first rigid housing 11 and the second rigid housing 12 enclose to form a first accommodation cavity 110, and the sound outlet hole 111 is arranged on the second rigid housing 12.

[0136] By setting the first rigid housing 11 to be connected to the earhook 300 and arranging the sound outlet hole 111 on the second rigid housing 12, the integrity of the sound outlet hole 111 is effectively guaranteed, the possibility of the sound outlet hole 111 being interfered is reduced, thereby improving the stability and reliability of the operation of the sound outlet hole 111, and the alignment difficulty between the first rigid housing 11 and the second rigid housing 12 can be reduced, thus reducing the assembly difficulty of the sound generating component 20 and improving the assembly efficiency of the sound generating component 20. And with such a setting, the sound outlet hole 111 does not need to penetrate through the first rigid housing 11 and the second rigid housing 12 simultaneously, which can avoid the uneven surface of the sound outlet hole 111, thereby affecting the installation of the sound tuning net and the steel net.

[0137] Optionally, as Figure 19 and Figure 20As shown, a convex block 123 protruding relative to the end face 122 of the second rigid housing 12 is provided on the second rigid housing 12, and a groove 113 recessed relative to the end face 114 of the first rigid housing 11 is provided on the first rigid housing 11. The convex block 123 is embedded in the groove 113, and a part of the sound outlet hole 111 is provided on the convex block 123. By providing the convex block 123 and the groove 113 to realize the connection between the first rigid housing 11 and the second rigid housing 12, and arranging a part of the sound outlet hole 111 on the convex block 123, while ensuring the connection stability between the first rigid housing 11 and the second rigid housing 12, the sound outlet hole 111 has a sufficient length, which is beneficial to improving the sound output effect of the earphone 1 and beneficial to improving the sound quality of the earphone 1.

[0138] Optionally, as Figure 19 and Figure 20 shown, the mounting boss 271 is located on the sound generating assembly 20. Of course, the mounting boss 271 can also be located on the second rigid housing 12. A third support table surface 115 is provided in the first rigid housing 11, and the third support table surface 115 is used to support the sound generating assembly 20, so that when the first rigid housing 11 and the second rigid housing 12 are fixed to each other, the sound generating assembly 20 and the second rigid housing 12 abut against each other through the mounting boss 271. Such a setting can simplify the structure and the assembly process, reduce the assembly difficulty, and improve the assembly efficiency.

[0139] Optionally, as Figure 7 shown, when the sound generating assembly 20 and the second rigid housing 12 form an abutment through the mounting boss 271, a certain gap can be maintained between the end face 114 of the first rigid housing 11 and the end face 122 of the second rigid housing 12 along the abutment direction of the sound generating assembly 20 and the second rigid housing 12. Such a setting can make it possible that when the sound generating assembly 20 is positioned and installed by abutting the first rigid housing 11 and the second rigid housing 12 against the sound generating assembly 20, a certain gap is maintained between the first rigid housing 11 and the second rigid housing 12 to offset the assembly error of the sound generating assembly 20, thereby effectively improving the accuracy and stability of the positioning and installation of the sound generating assembly 20. And during the production and assembly process, the mounting boss 271 first abuts against the sound generating assembly 20 and the second rigid housing 12, and then the first rigid housing 11 is buckled with the second rigid housing 12, so as to squeeze the sound generating assembly 20 and the second rigid housing 12 to achieve further fixation, effectively improving the abutment effect and the connection stability of the earphone 1.

[0140] Optionally, the axial direction (i.e., the direction of the axis Z) can be perpendicular to the abutment direction of the sound generating assembly 20 and the second rigid housing 12. Optionally, the magnetic circuit system 24 includes a magnetic conduction cover 241 protruding from the speaker frame 25 and a magnet 242 arranged in the magnetic conduction cover 241. As Figure 7 and Figure 19As shown, the third support tabletop 115 is configured to support the magnetic covers 241 of the two speakers 21 respectively. Such a configuration is to achieve the installation and fixation of the sound generating component 20 without affecting the vibration of the diaphragm 22, and the structure is stable, which is beneficial to improving the service life of the earphone 1.

[0141] Optionally, as Figure 9 and Figure 15 shown, the sound outlet hole 111 and the pressure relief hole 112 are respectively arranged in mirror symmetry with respect to the symmetry plane SF arranged along the length direction of the ear hook 300.

[0142] By arranging the sound outlet hole 111 and the pressure relief hole 112 which are respectively arranged in mirror symmetry with respect to the symmetry plane SF, while improving the aesthetics of the earphone 1, the earphone 1 can be applied to both the left ear and the right ear at the same time, thereby effectively improving the adaptability of the earphone 1.

[0143] Optionally, as Figure 4 shown, the earphone 1 further includes a microphone 30. An incoming sound hole 101 for guiding external sound to the microphone 30 is arranged on the first housing 10, and the incoming sound hole 101 intersects with the symmetry plane SF. The microphone 30 can be used to collect sound, so that the earphone 1 can adapt to different usage scenarios such as playing music and making calls. And by arranging the incoming sound hole 101 to intersect with the symmetry plane SF, while ensuring the effectiveness of the microphone 30 collecting sound through the incoming sound hole 101, the earphone 1 can be adapted to the use of both the left ear and the right ear at the same time, effectively improving the adaptability of the earphone 1. Figure 4 The cross-section corresponding to the cutting line V-V in

[0144] Optionally, the number of microphones 30 can be set to one or more, for example, it can be 1, 2, 4, etc. When the number of microphones 30 is one, the microphone 30 intersects with the symmetry plane SF. When the number of microphones 30 is multiple, the multiple microphones 30 are symmetrically distributed with respect to the symmetry plane SF. Such a configuration can further enable the earphone 1 to be adapted to the use of both the left ear and the right ear at the same time, effectively improving the adaptability of the earphone 1.

[0145] Optionally, as Figure 21 shown, Figure 21 is a schematic cross-sectional structure diagram of the sound generating part 100 with the symmetry plane SF as the cross-section. The minimum distance D10 between the sound outlet hole 111 and the pressure relief hole 112 is between 6.5 and 10 mm. Optionally, the minimum distance D10 is not less than 7 mm. Figure 21Taking the symmetry plane SF as the cross-section. Acoustic short circuit means that when the diaphragm 22 of the speaker 21 moves forward or backward, the generated sound waves are out of phase, resulting in mutual cancellation between these sound waves, thereby making the sound lighter or sounding unnatural. If the above interval distance D10 is too short, acoustic short circuit may occur. By reasonably setting the interval distance D10 between the sound outlet hole 111 and the pressure relief hole 112, the possibility of acoustic short circuit can be effectively reduced, which is beneficial to improving the sound quality of the earphone 1.

[0146] Optionally, as Figure 1 and Figure 17 shown, the pressure relief hole 112 is arranged towards the helix, and the sound outlet hole 111 and the pressure relief hole 112 are spaced from each other by the contact area between the first housing 10 and the ear part EAR. This contact area can be the contact area between the first housing 10 and the antihelix or the concha. By separating the sound outlet hole 111 and the pressure relief hole 112 through the first housing 10 and the contact area, the interference between the sound outlet hole 111 and the pressure relief hole 112 can be effectively reduced, thereby effectively improving the reliability of the operation of the earphone 1, being beneficial to improving the sound quality of the earphone 1, and being applicable to both the left ear and the right ear of the user at the same time, with high adaptability.

[0147] Optionally, as Figure 9 and Figure 21 shown, the number of the sound outlet holes 111 is one and is arranged in a strip shape. The symmetry plane is arranged along the length direction of the sound outlet hole 111 and is perpendicular to the axis direction (i.e., the direction of the axis Z). With such a setting, when the earphone 1 is worn by the user, since there is not a perfect fit between the first housing 10 and the concha of the user's ear part EAR, but there is a space gradually increasing from the contact area between the first housing 10 and the ear part EAR towards the ear canal opening, the sound output from the sound outlet hole 111 will be reflected in the concha to be enhanced, so as to utilize the reflection effect to increase the sound pressure at the ear canal opening, so that the user can hear a louder sound.

[0148] Optionally, as Figure 15 and Figure 21 shown, the number of the pressure relief holes 112 is one and is arranged in a strip shape. The symmetry plane SF is arranged along the width direction of the pressure relief hole 112 and is perpendicular to the axis direction (i.e., the direction of the axis Z). With such a setting, the pressure relief hole 112 and the sound outlet hole 111 are made as far away as possible, effectively reducing the possibility of acoustic short circuit, which is beneficial to improving the sound quality of the earphone 1.

[0149] Optionally, as Figure 22As shown, the pressure relief hole 112 includes a first hole portion 1121 and a second hole portion 1122 along the length direction of the pressure relief hole 112, and a third hole portion 1123 connected between the first hole portion 1121 and the second hole portion 1122. At least part of the width W1 of the first hole portion 1121 and the width at at least part of the position of the second hole portion 1122 are greater than the width W3 of the third hole portion 1123. The widths of the first hole portion 1121, the second hole portion 1122, and the third hole portion 1123 refer to the dimensions in the width direction perpendicular to the length direction of the pressure relief hole 112. Such a setting can effectively reduce the possibility that the pressure relief hole 112 is blocked by the helix or other ear (EAR) positions while increasing the area of the pressure relief hole 112, which is beneficial to improving the pressure relief effect and further beneficial to improving the sound quality of the earphone 1. Moreover, with such a setting, while maintaining the pressure relief effect, the overall pressure relief hole 112 does not need to be set according to the maximum width, making the size more appropriate and also facilitating the improvement of the aesthetics of the earphone 1.

[0150] Optionally, the symmetry plane SF is the symmetry plane of the earhook 300. Specifically, the symmetry plane of the earhook 300 is set along the length direction of the earhook 300, and the parts of the earhook 300 on both sides of the symmetry plane have the smallest difference or are the same. That is, if the earhook 300 is regularly symmetric, the parts of the earhook 300 on both sides of the symmetry plane are the same. If the earhook 300 is not strictly symmetric, the difference between the parts of the earhook 300 on both sides of the symmetry plane SF should be the smallest among various division methods. For example, the difference can be distinguished by observing the projection of the earhook 300 on a plane perpendicular to the symmetry plane.

[0151] Optionally, as Figure 19 , 20 and Figure 23 shown, the first housing 10 may further include a first flexible body 13. The first rigid housing 11 and the second rigid housing 12 enclose to form a first accommodation cavity 110, and the first flexible body 13 is disposed on the outer wall of the second rigid housing 12 and is used to contact the concha. The outermost loop plane of the end face of the first flexible body 13 is the first reference plane S13. The midpoint of the sound generating component 20 along the axis Z or the axis Z of the sound generating component 20 is located on the side of the first reference plane S13 facing the first rigid housing 11 and is parallel to the first reference plane S13.

[0152] The rigid material can be plastic, metal, or other support materials that can be used for the housing of the earphone 1 to provide better support and stability for the internal structure of the first housing 10, such as the sound generating component 20. The first flexible body 13 covers the outer wall of the second rigid housing 12. The first flexible body 13 can be made of silica gel or other skin-friendly flexible materials to improve the comfort when the sound generating part 100 contacts the wearer. Usually when worn, the second rigid housing 12 faces the concha cavity of the wearer and contacts the wearer. By covering the outer wall of the second rigid housing 12 with the first flexible body 13, the comfort of wearing the earphone 1 can be improved. In addition, by placing the midpoint of the sound generating component 20 along the axis Z or the axis Z of the sound generating component 20 on the side of the first reference plane S13 facing the first rigid housing 11, the center of the entire sound generating component 20 can be closer to the first rigid housing 11. That is, when the first flexible body 14 is provided on the outer wall of the second rigid housing 12, the centroid of the first housing 10 does not coincide with the centroid of the sound generating component 20, and the centroid of the sound generating component 20 is more biased towards the first rigid housing 11 relative to the centroid of the first housing 10, thus realizing the eccentric setting of the sound generating component 20, and thus making more use of the space inside the first rigid housing 11, which is beneficial to improving the space utilization rate.

[0153] Optionally, the distance D13 from the midpoint of the sound generating component 20 along the axis Z or the axis Z to the first reference plane S13 is between 0.4 and 4 mm. By setting the position of the sound generating component 20 in the first housing 10 in this way, more volume of the sound generating component 20 can be biased towards the first rigid housing 11, so as to make full use of the relatively abundant internal space of the first rigid housing 11, enabling the first housing 10 to accommodate a larger sound generating unit.

[0154] Optionally, the sound generating part 100 is arranged to keep at least part of the ear canal open in the concha cavity, reducing the possibility of blocking the ear canal and affecting the transmission of sound into the user's ear canal, and being beneficial to the formation of sound reflection in the user's concha cavity to increase the listening volume.

[0155] In some embodiments, optionally, as Figure 11 shown, the ratio of the maximum axial dimension Z21 to the maximum radial dimension R20 of the sound generating component 20 is between 0.8 and 1.3. Optionally, this ratio can be 0.9, 1, 1.1, 1.2, etc. In this way, the maximum axial dimension Z21 and the maximum radial dimension R20 of the sound generating component 20 are very close, making the outer contour of the sound generating component 20 closer to a spherical shape, effectively improving the structural compactness and integration of the sound generating component 20, and effectively reducing the assembly difficulty and improving the assembly efficiency.

[0156] Optionally, the maximum radial dimension R20 of the sound generating component 20 is set to the maximum radial dimension of the mounting bracket 27 or the speaker frame 25, so that the mounting bracket 27 or the speaker frame 25 serves as the main stress-bearing component during assembly, effectively protecting the diaphragm 22 and the voice coil 23, and effectively improving the reliability and effectiveness of the operation of the sound generating component 20. Optionally, the maximum axial dimension of the sound generating component 20 is set to the maximum axial dimension between the magnetic shields 241 of the two speakers 21 in the axial direction (i.e., the direction of the axis Z).

[0157] Optionally, in some embodiments, the resonance peak frequencies of the diaphragms 22 of the two speakers 21 are between 200 Hz and 300 Hz, and the absolute difference between the resonance peak frequencies of the diaphragms 22 of the two speakers 21 is less than or equal to 50 Hz. Among them, the resonance peak can be the first resonance peak that appears during the frequency sweep from low frequency to high frequency. Specifically, the resonance peak frequency refers to the frequency of the first resonance peak that appears in the order of increasing frequency during the electro-acoustic frequency sweep test of the structure composed of, for example, the speaker 21, the first housing 10, and the internal cavity of the first housing 10 in the sound generating part 100, and the position where the resonance peak appears corresponds to the position where the impedance curve of the sound generating part 100 suddenly increases.

[0158] By setting the speakers 21 with resonance peak frequencies within a reasonable range, the types and ranges of sound fields played by the speakers 21 are relatively wide, and there is better sound quality not only in vocals but also in aspects such as music playback. Moreover, the absolute difference between the resonance peak frequencies of the two speakers 21 is less than or equal to 50 Hz, so that the consistency of the two speakers 21 is relatively high, and the earphone 1 further improves the sound quality of the earphone 1.

[0159] In some embodiments, as Figure 21 shown, the sound outlet hole 111 is strip-shaped and has a first end 111a and a second end 111b that are spaced apart along the length direction of the sound outlet hole 111. In the wearing state, the first end 111a is arranged facing the ear hole E11, and the distance D10 between the outer wall surface of the first housing 10 at the second end 111b and the inner wall surface of the concha cavity E12 is less than the distance D10 between the outer wall surface of the first housing 10 at the first end 111a and the inner wall surface of the concha cavity E12.

[0160] By arranging the first housing 10 such that the first end 111a of the sound outlet hole 111 faces the ear hole, it enables sound waves to enter the ear hole through the sound outlet hole 111 as much as possible, effectively shortening the transmission path of the sound waves, effectively enhancing the volume effect of the sound heard by the user, and being beneficial to improving the sound quality of the earphone 1. In addition, by setting the distance D10 between the outer wall surface of the first housing 10 at the second end 111b and the inner wall surface of the concha E12 to be less than the distance D10 between the outer wall surface of the first housing 10 at the first end 111a and the inner wall surface of the concha E12, a kind of wedge-shaped space can be formed between the curve formed by the outer circle of the speaker 21 cutting the first housing 10 and the concha. When arranging the sound outlet hole 111 along the curve, a horn structure can be formed between the sound outlet hole 111 and the concha. Using the concha E12 as a reflecting wall surface can enhance the sound wave reflection, thereby effectively increasing the sound pressure at the ear hole and effectively increasing the listening volume.

[0161] Optionally, as Figure 21 shown, at the second end 111b and / or on the side of the second end 111b away from the first end 111a, the outer wall surface of the first housing 10 and the inner wall surface of the concha are in contact with each other. With such an arrangement, it can block the sound from spreading in the direction away from the ear hole, which is more conducive to the first housing 10 and the concha forming a horn structure that reflects sound towards the ear hole, thereby being beneficial to reducing the sound leakage of the earphone 1, effectively increasing the sound pressure at the ear hole, and effectively increasing the listening volume.

[0162] Optionally, as Figure 21 shown, the outer wall surface of the first housing 10 is arranged such that the long side hole edge 111c of the sound outlet hole 111 is arc-shaped, and the distance D10 between the outer wall surface of the first housing 10 and the inner wall surface of the concha gradually increases in the direction from the second end 111b to the first end 111a. With such an arrangement, it can make the sound reflect towards the ear hole within the horn structure formed between the concha E12 and the outer wall surface of the first housing 10, rather than reflecting in the direction away from the ear hole, effectively enhancing the sound output effect of the earphone 1, effectively increasing the sound pressure at the ear hole, and effectively increasing the listening volume.

[0163] Optionally, as Figure 21As shown, the arc-chord ratio of the long side hole edge 111c of the sound outlet hole 111 is between 1.05 and 1.4, for example, it can be 1.1, 1.2, 1.3, etc. Wherein, a symmetric plane is provided along the length direction of the ear hook 300, and the arc-chord ratio of the long side hole edge 111c of the sound outlet hole 111 is the arc-chord ratio of the projection profile of the long side hole edge 111c on the symmetric plane. In some embodiments, the arc length of the long side hole edge 111c of the sound outlet hole 111 is 10mm, and the chord length is 8.87mm. Optionally, the aspect ratio of the sound outlet hole 111 is between 0.15 and 0.30, for example, 0.18, 0.20, 0.25, etc. Optionally, the length of the sound outlet hole 111 can be between 9mm and 16.5mm, for example, 10mm, 12mm, 13mm, 14mm, 16mm, etc. In some embodiments, the inner width of the sound hole 111 is 1.95 mm, the outer width is 2.58 mm, and the length of the sound hole 111 is 12.9 mm. By reasonably setting the arc length, chord length, width and length of the long side hole edge 111c of the sound hole 111, the size of the sound hole 111 is more consistent with the size and shape of the concha cavity and the ear hole, which is more convenient to form a horn structure that enhances the sound, effectively improves the sound effect of the earphone 1, effectively increases the sound pressure at the ear hole, and effectively increases the listening volume.

[0164] Alternatively, if Figure 24 As shown, when the sound-emitting part 100 and the abutting part 400 are placed on a horizontal reference plane at the same time, the long side hole edge 111c of the sound-emitting hole 111 forms a first reference point M with the horizontal reference plane between the first end 111a and the second end 111b, the second end 111b is located on the side of the first reference point M facing the abutting part 400, and the first end 111a is located on the side of the first reference point M away from the abutting part 400. Such a configuration can make the first end 111a of the sound-emitting hole 111 closer to the ear hole, and the first shell 10 near the second end 111b can abut against the concha cavity and be clamped on both sides of the user's ear EAR with the abutting part 400, thereby achieving a stable clamping of the ear EAR while utilizing the concha cavity to increase the volume and sound pressure, and the portion of the first shell 10 abutting against the concha cavity can further block the sound from propagating in the direction away from the ear hole, which is conducive to reducing sound leakage.

[0165] Optionally, the length D12 between the long-side hole edge 111c of the sound outlet hole 111 at the first end 111a and the first reference point M is between 2 and 5.5 mm. For example, it can be 2.55 mm, 3.56 mm, 4 mm, 4.76 mm, etc. The length D13 between the long-side hole edge 111c of the sound outlet hole 111 at the second end 111b and the first reference point M is between 4.5 and 8 mm. For example, it can be 5.53 mm, 6 mm, 6.73 mm, 7.81 mm, etc. The above lengths all refer to the distances between the corresponding positions on the projected contour of the sound outlet hole 111 on the symmetry plane. By reasonably setting the distances from the first end 111a and the second end 111b to the first reference point M, the enhancement effect of the sound wave propagation from the concha cavity E12 to the ear hole is further improved, the sound pressure at the ear hole is effectively increased, and the listening volume is effectively increased.

[0166] Optionally, the arc-chord ratio of the long-side hole of the sound outlet hole 111 between the first end 111a and the first reference point M is between 1.02 and 1.05. For example, it can be 1.03, 1.04, etc. The arc-chord ratio of the long-side hole of the sound outlet hole 111 between the second end 111b and the first reference point M is between 1.02 and 1.05. For example, it can be 1.03, 1.04, etc. The above arc-chord ratios all refer to the arc-chord ratios between the corresponding positions on the projected contour of the sound outlet hole 111 on the symmetry plane. By reasonably setting the arc-chord ratios of the long-side hole edge 111c of the sound outlet hole 111 between the first end 111a and the second end 111b and the first reference point M, while adapting to the shape of the user's concha cavity to ensure wearing comfort, the sound reflection effect of the horn structure formed by the outer wall surface of the first housing 10 and the concha cavity is improved, and the listening volume and the user experience are effectively enhanced.

[0167] Optionally, as Figure 24 shown, the long-side hole edge 111c of the sound outlet hole 111 has a first normal direction F1 at the first reference point M, a second normal direction F2 at the first end 111a of the long-side hole edge 111c of the sound outlet hole 111, and a third normal direction F3 at the second end 111b of the long-side hole edge 111c of the sound outlet hole 111. The included angle α1 between the first normal direction F1 and the second normal direction F2 is between 30° and 42°, and the included angle α2 between the first normal direction F1 and the third normal direction F3 is between 50° and 60°. The included angle α1 between the first normal direction F1 and the second normal direction F2 can be, for example, 32°, 35°, 37°, etc., and the included angle α2 between the first normal direction F1 and the third normal direction F3 can be, for example, 53°, 55°, 57°, etc. The above included angles all refer to the included angles between the corresponding positions on the projected contour of the sound outlet hole 111 on the symmetry plane. By reasonably setting the above included angles, while ensuring the spatial size of the sound outlet hole 111, the sound reflection effect of the horn structure formed between the outer wall surface of the first housing 10 and the concha cavity is improved, and the listening volume and the user experience are effectively enhanced.

[0168] Optionally, as Figure 9 shown, the sound outlet hole 111 has a central dividing line disposed along its length direction. The sound outlet hole 111 intersects with a reference section SF disposed along the length direction of the earhook 300, and the angle between the plane where the central dividing line is located and the reference section SF is between 0° and 45°. Moreover, the sound outlet hole 111 is offset towards the earlobe direction. The central dividing line can be a virtual curve that divides the sound outlet hole 111 into two equal parts along the length direction. Preferably, the sound hole 111 intersects with the reference section SF disposed along the length direction of the earhook 300, and the angle between the plane where the central dividing line is located and the reference section SF is between 15° and 45°, such as 20°, 30°, etc. In some embodiments, the reference section SF can coincide with the symmetry plane of the earhook 300 disposed along the length direction. Therefore, the symmetry plane is also labeled as the symmetry plane SF when describing the symmetry plane later. In this way, the reference section SF can be disposed along the length direction of the earhook 300, and the parts of the earhook 300 on both sides of the reference section SF have the smallest difference or are consistent. Of course, in some other embodiments, the reference section SF and the symmetry plane of the earhook are parallel to each other, but can be offset by a small distance.

[0169] By reasonably setting the angle between the central dividing line of the sound outlet hole 111 and the reference section SF of the earhook 300, and setting the sound outlet hole 111 to be offset towards the earlobe direction, while ensuring the wearing comfort of the user, the sound output from the sound outlet hole 111 can be transmitted to the ear canal as much as possible, effectively improving the usage experience of the earphone 1. Specifically, when the user wears the earphone 1 naturally, the earphone 1 may deflect downward under the action of gravity as the user moves. Such a setting can ensure that even when the earphone 1 is deflected, the sound outlet hole 111 is still as much as possible facing the ear canal, effectively increasing the listening volume of the user when the earphone 1 is in a deflected state and improving the user's usage experience.

[0170] Optionally, the plane where the central dividing line is located coincides with the reference section SF. Or, the sound outlet hole 111 is mirror-symmetrical with respect to the reference section SF. Such a setting enables the earphone 1 to adapt to the wearing and use of both the left ear and the right ear at the same time, effectively improving the adaptability of the earphone 1 while ensuring the wearing comfort of the user.

[0171] Optionally, as Figure 25As shown, on the reference section SF, the sound - generating part 100 has a second reference point N closest to the abutting part 400. In some embodiments, in the natural state, the sound - generating part 100 and the abutting part 400 do not directly abut. Then, the second reference point N is the intersection point of the shortest connection line between the sound - generating part 100 and the abutting part 400 and the outer wall surface of the sound - generating part 100, and the mid - point of this shortest connection line is O. In other embodiments, in the natural state, the sound - generating part 100 and the abutting part 400 just abut or the abutting area is very small, then the abutting point between the sound - generating part 100 and the abutting part 400 is considered as the second reference point N. In still other embodiments, in the natural state, the abutting area between the sound - generating part 100 and the abutting part 400 is relatively large. Then, on the reference section SF, the mid - point of the arc corresponding to the abutting area between the outer wall surface of the sound - generating part 100 and the abutting part 400 is the second reference point N.

[0172] The inner contour of the earhook 300 has a third reference point C farthest from the second reference point N in the area close to the helix edge in the wearing state. The sound outlet hole 111 is located on the side of the second reference point N away from the third reference point C. On the outer wall surface of the sound - generating part 100, the distance D13 from the second end 111b to the second reference point N is between 2.2 and 4.2 mm, and the distance from the first end 111a to the second reference point N is between 9 and 12.4 mm. The distance from the second end 111b to the second reference point N can be, for example, 2.3 mm, 2.6 mm, 2.9 mm, etc., and the distance from the first end 111a to the second reference point N can be 9.8 mm, 10.7 mm, 11.6 mm, etc. Of course, it can also be other values. The above - mentioned distances all refer to the distances between the corresponding positions on the projected contour of the sound outlet hole 111 on the symmetry plane.

[0173] Optionally, as Figure 15 shown, the pressure - relief hole 112 is arranged towards the helix and intersects with the reference section SF. Such an arrangement can ensure the pressure - relief effect of the pressure - relief hole 112 while effectively reducing the possibility of interference between the pressure - relief hole 112 and the sound outlet hole 111, and effectively improving the stability and reliability of the operation of the earphone 1.

[0174] Optionally, as Figure 1 and Figure 21 shown, the pressure - relief hole 112 and the sound outlet hole 111 are separated from each other by the contact area between the sound - generating part 100 and the ear part EAR (such as the concha). Separating the sound outlet hole 111 and the pressure - relief hole 112 through the contact area between the sound - generating part 100 can effectively reduce the possibility of acoustic short - circuit between the sound outlet hole 111 and the pressure - relief hole 112, thereby effectively improving the reliability of the operation of the earphone 1, being beneficial to improving the sound quality of the earphone 1, and being applicable to both the left ear and the right ear of the user, with high adaptability.

[0175] Optionally, as Figure 15As shown, the number of pressure relief holes 112 is one, and they are arranged in a strip shape. The reference section SF is arranged along the width direction of the pressure relief holes 112. Such an arrangement ensures the pressure relief area to effectively guarantee the pressure relief effect of the pressure relief holes 112, while preventing the pressure relief holes 112 from extending excessively towards the earhook 300, which is beneficial to improving the aesthetics of the earphone 1.

[0176] Optionally, as Figure 15 shown, the pressure relief holes 112 are mirror-symmetrical with respect to the reference section SF. While improving the aesthetics of the earphone 1, it enables the earphone 1 to adapt to the wearing of the left and right ears, effectively improving the adaptability of the earphone 1.

[0177] Optionally, as Figures 15 to 17 shown, the sound generating component 20 is provided with at least one second sound guiding hole 204 that communicates with the pressure relief holes 112 through the first accommodating space. The distance between at least one second sound guiding hole 204 and the pressure relief holes 112 is not greater than 0.5 mm. Optionally, this distance is not greater than 0.4 mm, and optionally, this distance is not greater than 0.3 mm. If the distance from the sound guiding hole to the pressure relief holes 112 is too large, it will lead to a decrease in the pressure relief performance, thereby affecting the sound quality of the earphone 1. By reasonably setting the distance from the sound guiding hole to the pressure relief holes 112, the pressure relief efficiency is effectively improved, which is beneficial to improving the sound quality of the earphone 1.

[0178] Optionally, as Figure 4 、 Figures 19 to 21 shown, the earphone 1 further includes a microphone 30. An incoming sound hole 101 for guiding external sound to the microphone 30 is provided on the first housing 10, and the incoming sound hole 101 intersects with the reference section SF. The microphone 30 can be used to collect sound, enabling the earphone 1 to adapt to different usage scenarios such as playing music and making calls. By arranging the incoming sound hole 101 to intersect with the reference section SF, while ensuring the effectiveness of the microphone 30 collecting sound through the incoming sound hole 101, the earphone 1 can adapt to the use of both the left and right ears, effectively improving the adaptability of the earphone 1. Figure 4 The cross-section corresponding to the cutting line V - V in

[0179] Optionally, the earhook 300 provides an elastic force between the sound generating part 100 and the abutting part 400, so that the sound generating part 100 and the abutting part 400 have a clamping force F that clamps on both sides of the auricle in the wearing state. As Figure 26 shown, the earhook 300 is arranged such that the sound generating part 100 and the abutting part 400 abut against each other in the natural state to form a pre-tightening force F0.

[0180] In the worn state, the earhook 300 can undergo a certain elastic deformation to apply a certain elastic force on both sides of the user's auricle. Under the action of the elastic force, the sound-emitting part 100 and the abutting part 400 respectively abut against both sides of the auricle to clamp the ear. However, if the elastic force provided by the earhook 300 is too large, the clamping force F will be too large, causing discomfort to the ear. If it is too small, the clamping force F will be too small and it will be difficult to wear stably.

[0181] According to Hooke's law, the elastic force generated by elastic deformation is proportional to the amount of deformation of the object, and the ratio is the elastic coefficient. To meet the requirement of clamping an ear with a smaller thickness, the elastic coefficient of the earhook 300 is usually set to be relatively large. However, this will result in too large an elastic force being applied when clamping an ear with a larger thickness, causing pain and not a high level of wearing comfort. Moreover, a larger elastic coefficient leads to a relatively large change in the clamping force F when adapting to ears of different thicknesses, and thus a relatively large difference in the clamping force F, resulting in a relatively large difference in the user experience and low compatibility. As Figure 27 shown, the clamping force change line L1 has no pre-tightening force and a relatively large elastic coefficient, resulting in a relatively large clamping force F when the distance between the sound-emitting part 100 and the abutting part 400 changes from X s to X m , and a relatively large change in the clamping force change amount △F1. Based on this, by setting the earhook 300 such that the sound-emitting part 100 and the abutting part 400 abut against each other in the natural state to form a pre-tightening force, the elastic coefficient of the earhook 300 can be reduced, so that when clamping ears with smaller and larger thicknesses, the elastic force applied by the earhook 300 changes less, effectively reducing the difference in the clamping force F for clamping ears with smaller and larger thicknesses, effectively improving the adaptability and wearing comfort of the earphone 1, and enabling the earphone 1 to be worn by a larger number of users with different ear sizes. As Figure 27 shown, relative to the clamping force change line L1, on the basis of having a pre-tightening force F0, when the distance between the sound-emitting part 100 and the abutting part 400 changes from X s to X m , the clamping force F is smaller and the clamping force change amount △F2 is also smaller, so the above technical effects can be effectively achieved, such as reducing the difference in the clamping force F for clamping ears with smaller and larger thicknesses, effectively improving the adaptability and wearing comfort of the earphone 1, and enabling the earphone 1 to be worn by a larger number of users with different ear sizes.

[0182] After a large number of empirical studies conducted by the applicant to improve the wearing comfort of the earphone 1, it was found that the ear thickness X s of the small-ear population is approximately 3.8 mm, while the ear thickness X m of the large-ear population is approximately 5.5 mm. After obtaining this data, the applicant conducted corresponding research on the earphone 1 in terms of pre-tightening force and elastic coefficient, etc.

[0183] Optionally, the elastic coefficient of the ear hook 300 is set such that when the minimum distance between the sound generating part 100 and the abutting part 400 increases from 3.8 mm to 5.5 mm, the change in the elastic acting force is less than or equal to 20 gf, and can be, for example, 5 gf, 10 gf, 15 gf. As Figure 27 shown, on the basis of having a pre-tightening force F0, when the distance between the sound generating part 100 and the abutting part 400 is X m the clamping force F is small, and the change in the clamping force ΔF2 is also small.

[0184] By reasonably setting the elastic coefficient, so that when the elastic acting force meets the clamping requirement, the change in the elastic acting force is small, so that when the earphone 1 clamps ears with a larger thickness and a smaller thickness, the difference in the clamping force provided by the ear hook 300 is small, while meeting the wearing comfort, effectively improving the adaptability of the earphone 1.

[0185] Optionally, the elastic coefficient and the pre-tightening force of the ear hook 300 are set such that when the minimum distance between the sound generating part 100 and the abutting part 400 increases from 3.8 mm to 5.5 mm, the elastic acting force is between 25 gf and 65 gf, and can be, for example, 30 gf, 40 gf, 50 gf, etc.

[0186] By reasonably setting the elastic coefficient and the pre-tightening force of the ear hook 300 to provide a suitable elastic acting force, so as to provide a suitable clamping force F for the user in the wearing state, while ensuring the wearing stability, improving the wearing comfort.

[0187] As Figure 28 shown, the pre-tightening force F0 can be measured by the thin film pressure sensor 600, specifically by measuring the thin film pressure sensor 600 clamped between the abutting part 400 and the sound generating part 100. In some other embodiments, as Figure 29 and Figure 30 shown, the pre-tightening force F0 can also be measured by the tensiometer / sensor 607, 613. For example, by fixing one of the sound generating part 100 and the abutting part 400, and pulling the other of the sound generating part 100 and the abutting part 400, so that the two just contact / separate, or when the minimum distance between the two is a smaller distance, the measured pulling force is the pre-tightening force. The smaller distance is, for example, 0 to 0.8 mm.

[0188] As Figure 29 and Figure 30 shown, the clamping force F can be measured when the sound generating part 100 and the abutting part 400 are horizontally arranged, specifically by fixing the abutting part 400 with the tensiometer / sensor and pulling the sound generating part 100 for measurement. For example, after bonding a wire to the housing of the sound generating part 100, pulling the wire displacement, for example, 3.8 mm to 5.5 mm for measurement.

[0189] As shown Figure 29 in the figure, the auxiliary plate 603 and the angle code 601 are fixed in the X direction (no relative displacement in the X direction) by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.) or other fixing means that do not damage the structure of the earphone 1, the auxiliary plate 604 and the angle code 602 are fixed in the X direction (no displacement in the X direction), and the auxiliary plate 603 and the auxiliary plate 604 are placed on a support table with a relatively small coefficient of friction in the X direction (e.g., a lubricating oil interface or a support table on a bearing support). The inner sides of the angle code 601 and the angle code 602 in the Y direction are respectively tangent to both sides of the earphone 1 near the two ends of the earhook 300, so as to fix the earphone 1 between the angle code 601 and the angle code 602. The dynamometer 607 is connected to the angle code 602 in the X direction, for example, the dynamometer 607 and the angle code 602 are fixed by a screw 606. In some embodiments, the earphone 1 can be further fixed by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.) or other fixing means that do not damage the structure of the earphone 1, so that the connection positions of the earphone 1 with the two angle codes 601 and 602 are close to the horizontal direction. For example, as Figure 29 shown in the figure, one side of the sound generating part 100 is fixedly connected to the angle code 601 at position A, one side of the abutting part 400 is fixedly connected to the angle code 602 at position B, and the line connecting position A and position B is approximately parallel to the X direction. During measurement, the auxiliary plate 604 is fixed, and the auxiliary plate 603 is moved with a pulling force in the X direction, so that the sound generating part 100 and the abutting part 400 are pulled apart, and the magnitude of the pulling force is obtained through the dynamometer 607, and the distance between the auxiliary plate 603 and the auxiliary plate 604, that is, the distance by which the sound generating part 100 and the abutting part 400 are pulled apart, is obtained through a vernier caliper.

[0190] As Figure 30 shown in the figure, the abutting part 400 is fixed between the two clamping plates by a fastening member 608, one end of the force measuring line 612 is connected to the housing on the side of the sound generating part 100 away from the abutting part 400 (e.g., the force measuring line 612 is connected to the sound generating part 100 at position C, and the symmetry plane SF of the earhook 300 can pass through position C) by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.), and the other end of the force measuring line 612 is connected to the dynamometer 614. The force measuring line 612 is parallel to the X direction. During measurement, the dynamometer 614 is moved with a pulling force in the X direction, thereby pulling the sound generating part 1 to move, so that the sound generating part 100 and the abutting part 400 are pulled apart, and the distance by which the sound generating part 100 and the abutting part 400 are pulled apart is obtained through the vernier caliper 609, and the magnitude of the pulling force is obtained through the dynamometer 14.

[0191] Optionally, the pre-tightening force is set to be between 1 gf and 25 gf, and the elastic coefficient of the earhook 300 is set such that when the minimum spacing is 3.85 mm, the elastic force is between 25 gf and 48 gf, and when the minimum spacing is 5.5 mm, the elastic force is between 26 gf and 65 gf. Optionally, the width of the earhook 300 can be between 3 and 10 mm, and the thickness can be between 0.5 and 5 mm. By reasonably setting the width and thickness parameters of the earhook 300, the elastic force changes substantially linearly in the usage scenario, and while satisfying the clamping stability, the wearing comfort is effectively improved, the adaptability of the earphone 1 is effectively improved, as well as the wearing stability and reliability.

[0192] Optionally, as Figure 26 shown, the earphone 1 may further include a magnetic coupling matching structure 50. The magnetic coupling matching structure 50 provides a magnetic coupling force between the sound generating part 100 and the abutting part 400. The magnetic coupling force and the elastic force cooperate to form a clamping force F. The change trend of the magnetic coupling force with respect to the minimum spacing between the sound generating part 100 and the abutting part 400 is opposite to the change trend of the elastic force with respect to the minimum gap. For example, when the minimum spacing between the sound generating part 100 and the abutting part 400 gradually increases, the elastic force gradually increases and the magnetic coupling force gradually decreases. Among them, the magnetic coupling force provided by the magnetic coupling matching structure 50 can be used for the case where the sound generating part 100 and the abutting part 400 abut against each other when the earhook 300 is in the natural state, and can also be used for the case where the earhook 300 is set such that the sound generating part 100 and the abutting part 400 are separated from each other in the natural state.

[0193] By setting the magnetic coupling matching structure 50 to provide the magnetic coupling force, the magnetic coupling force can cooperate with the elastic force to provide a more appropriate clamping force F in the wearing state, and can effectively reduce the change and fluctuation of the clamping force F when the minimum spacing changes, effectively improving the wearing comfort, reducing the pre-tightening force required by the earhook 300, and making the wearing process of the user smoother.

[0194] Optionally, as Figure 31As shown, the magnetic coupling matching structure 50 includes a first magnetic coupling matching member 51 disposed on the sound generating portion 100 and a second magnetic coupling matching member 52 disposed on the abutting portion 400, and the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 are magnetically attracted to each other. The first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 can be magnets. The first magnetic coupling matching member on the sound generating portion 100 can be the magnet 242 of the speaker 21, or an additional magnet or other magnetic member. By respectively disposing the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 on the sound generating portion 100 and the abutting portion 400, the magnetic attraction between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 is used to provide a magnetic coupling force, so as to maintain a relatively stable and appropriate clamping force when clamping the ear EAR with a larger or smaller thickness, effectively improving the wearing comfort. Optionally, the magnets can be arranged in a Halbach array to increase the provided magnetic force, which is beneficial to improving the wearing stability. Optionally, the magnets are disposed in the first flexible body 14 to avoid interference with other components and improve the integration and compactness of the structure of the earphone 1.

[0195] In the wearing state, the attraction between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 can compensate for the clamping force F between the sound generating portion 100 and the abutting portion 400. As Figure 31 shown, the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 can attract each other to generate an attraction force FA to compensate for the clamping force F provided by the ear hook 300 for the sound generating portion 100 and the abutting portion 400. That is to say, in the wearing state, the clamping force F includes the attraction force F A and the elastic acting force F generated by the elastic deformation of the ear hook 300 k . In some embodiments, the relationship between the distance and the attraction force between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 can be expressed by formula (1):

[0196]

[0197] where K is a constant, m 1 can represent the magnetic moment of the first magnetic coupling matching member 51, m 2 can represent the magnetic moment of the second magnetic coupling matching member 52, d can represent the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52, X 0 can represent the distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 in the non-wearing state, and x can represent the increased distance between the first magnetic coupling matching member 51 and the second magnetic coupling matching member 52 in the wearing state due to the movement of the sound generating portion 100 and the abutting portion 400.

[0198] As can be seen from formula (1), the greater the increase in distance X between the sound - generating part 100 and the abutting part 400, the larger the distance d between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52, and the attraction force F between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52 A decreases accordingly.

[0199] In some embodiments, a dynamometer and cushioning materials of different thicknesses (such as silicone pads, thick paper sheets, rubber pads, etc.) can be used to measure the different attraction forces corresponding to different distances between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52. For example, the earhook 300 of the earphone 1 can be cut off, and then either the sound - generating part 100 or the abutting part 400 is fixed, and the other part of the sound - generating part 100 and the abutting part 400 is connected to the dynamometer. The sound - generating part 100, the abutting part 400, and the dynamometer can generally refer to Figure 29 and Figure 30 . Different - thickness cushioning materials are placed between the sound - generating part 100 and the abutting part 400 to control the distance between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52, and at the same time, the attraction force between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52 is measured by the dynamometer when different - thickness cushioning materials are placed. In some embodiments, the attraction force can be measured by a thin - film pressure sensor. Specifically, after cutting off the earhook 300, the thin - film pressure sensor and different - thickness cushioning materials are placed between the sound - generating part 100 and the abutting part 400, so that the thin - film pressure sensor is squeezed by the attraction force between the first magnetic coupling matching part 51 in the sound - generating part 100 and the second magnetic coupling matching part 52 in the abutting part 400, thereby measuring the attraction force corresponding to different distances between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52.

[0200] In some embodiments, in the non - wearing state, the earhook 300 can provide a pre - tightening force F0 to make the sound - generating part 100 and the abutting part 400 abut against each other. For a detailed description of the pre - tightening force, reference can be made to the above - related description, which will not be elaborated here.

[0201] In some embodiments, in the non - wearing state, the sound - generating part 100 and the abutting part 400 do not contact each other. In the non - wearing state, the sound - generating part 100 and the abutting part 400 do not contact each other, that is, there is no pre - tightening force between the sound - generating part 100 and the abutting part 400 to make them abut against each other.

[0202] In some embodiments, in the wearing state, the clamping force F between the sound - generating part 100 and the abutting part 400 includes the elastic acting force F generated by the elastic deformation of the earhook 300 k and the attraction force F between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52 A . In some embodiments, the clamping force F may further include the pre - tightening force F0 provided by the earhook 300 for the sound - generating part 100 and the abutting part 400 to abut against each other.

[0203] As can be seen from the foregoing, in order to ensure the stability of the earphone 1 when worn on the wearer's ear, the clamping force F (i.e., the sum of the elastic force and the attractive force, or the sum of the elastic force, the attractive force and the pre-tightening force) needs to be greater than the lower limit of the clamping force corresponding to the minimum auricle thickness. And it is necessary to ensure that the clamping force is less than the upper limit value of the clamping force corresponding to the maximum auricle thickness to avoid causing discomfort to users with a larger auricle thickness when wearing the earclip-type earphone. In some embodiments, when the distance between the housing of the sound generating part 100 and the abutting part 400 is between 3.5 mm and 5.6 mm or between 3.8 mm and 5.5 mm, the clamping force F (i.e., the sum of the elastic force and the attractive force, or the sum of the elastic force, the attractive force and the pre-tightening force) can be between 0.20 N and 0.70 N. For example, based on the lower limit of the clamping force of 0.20 N corresponding to the minimum auricle thickness and the upper limit of the clamping force of 0.70 N corresponding to the maximum auricle thickness, it can be determined that the clamping force (i.e., the sum of the elastic force and the attractive force, or the sum of the elastic force, the attractive force and the pre-tightening force) provided by the earhook 300 is between 0.20 N and 0.70 N. In some embodiments, when the distance between the housing of the sound generating part 100 and the abutting part 400 is between 3.8 mm and 5.5 mm, the clamping force F (i.e., the sum of the elastic force and the attractive force, or the sum of the elastic force, the attractive force and the pre-tightening force) can be between 0.25 N and 0.65 N. Again, for example, based on the lower limit of the clamping force of 0.25 N corresponding to the minimum auricle thickness and the upper limit of the clamping force of 0.65 N corresponding to the maximum auricle thickness, it can be determined that the clamping force (i.e., the sum of the elastic force and the attractive force, or the sum of the elastic force, the attractive force and the pre-tightening force) provided by the earhook 300 is between 0.25 N and 0.65 N.

[0204] As can be seen from the foregoing, the greater the distance X between the sound generating part 100 and the abutting part 400, the greater the elastic force F provided by the earhook 300 k and the smaller the attractive force F between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52. A Therefore, the gap between the clamping force F received by small-ear users and the clamping force F received by large-ear users can be further reduced based on the attractive force between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52. For example, the clamping force F is limited to between 0.3 N and 0.5 N, that is, the gap between the clamping force received by small-ear users and the clamping force received by large-ear users is reduced to 0.20 N at the same time. In some embodiments, when the distance between the housing of the sound generating part 100 and the abutting part 400 is between 3.8 mm and 5.5 mm, the change in the clamping force F does not exceed 0.20 N. Thus, as Figure 27 shown, in order to ensure that the gap between the clamping force received by small-ear users and the clamping force received by large-ear users is small, it is possible to base on the minimum auricle thickness Xs, the set lower limit of the clamping force F1, the maximum auricle thickness X mWhen the upper limit of the set clamping force is F3, it is defined that when the distance between the sound generating part 100 and the abutting part 400 varies between 3.8 mm and 5.5 mm, the change in the clamping force does not exceed 0.20 N (i.e., the difference between F3 and F1), for example.

[0205] In some embodiments, when the distance between the sound generating part 100 and the abutting part 400 is between 3.8 mm and 5.5 mm, the change in the attractive force between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52 can be between 0.05 N and 0.10 N.

[0206] As Figure 32 shown, the clamping force F includes an elastic acting force F k and an attractive force F A . The initial distance between the first magnetic coupling matching part 51 and the second magnetic coupling matching part 52 is X 0 . The elastic acting force F k is equal to kX, where k is the elastic coefficient and X is the distance between the sound generating part 100 and the abutting part 400. The attractive force F A can be calculated based on the formula (1) described above. When the distance between the sound generating part 100 and the abutting part 400 is between X 1 and X 2 , the elastic acting force F k is between F sk and F mk , the attractive force F A is between F ma and F sa , and the clamping force F is between F s and F m , where F s = F ma + F sk , F m = F mk + F sa . For example, when the distance between the sound generating part 100 and the abutting part 100 is between 3.8 mm and 5.5 mm, the corresponding elastic acting force is between 0.27 N and 0.35 N. In order to ensure that the clamping force is between 0.3 N and 0.4 N, the attractive force that needs to be compensated is between 0.03 (0.3 - 0.27 = 0.03) N and 0.05 (0.4 - 0.35 = 0.05) N. It can be seen from Figure 32 that by setting appropriate magnetic coupling parameters (K, m1, m2, X 0 ), etc. and the elastic coefficient k, etc., it is possible to achieve that within the range of X 1 to X 2 , the increment of F k and the decrement of FA are approximately offset or mostly offset from each other, so that the total clamping force F is between X 1 and X 2remains basically stable within the range, so that the user experience brought by the earphone 1 to users with different auricle thicknesses remains consistent. X 1 ~X 2 The range of, for example, includes 3.8 mm to 5.5 mm.

[0207] In some embodiments, the earhook 300 further provides a pre-tightening force F0, and the total clamping force F can be kept within a suitable range by adjusting the magnitudes of the pre-tightening force F0 and the attractive force F A As shown, the earhook 300 can simultaneously provide an elastic acting force F Figure 33 As shown, the earhook 300 can simultaneously provide an elastic acting force F k , a pre-tightening force F0 and an attractive force F A . At this time, the clamping force F of the earhook 300 on users with large ears has exceeded the upper limit of the pre-tightening force. The clamping force F can be made to be within the range of the minimum auricle thickness X s and the maximum auricle thickness X m by reducing the pre-tightening force F0 from F01 to F02. The curve corresponding to the clamping force F is relatively gentle within this range, and within the appropriate clamping force interval range, indicating that the cooperation of the pre-tightening force and the attractive force can improve the wearing stability and comfort of the earclip-type earphone and reduce the difference in clamping force between users with large ears and small ears.

[0208] Optionally, the elastic acting force and the magnetic coupling acting force are set such that when the minimum distance between the sound generating part 100 and the abutting part 400 increases from 3.85 mm to 5.5 mm, the clamping force is between 25 gf and 65 gf, and can be, for example, 30 gf, 40 gf, 50 gf, 60 gf, etc. It should be noted that 1 gf represents the gravity of an object of 1 gram.

[0209] By reasonably setting the elastic acting force and the magnetic coupling acting force, a consistent clamping force is provided for users with different ear sizes in the wearing state, improving the wearing comfort while ensuring the wearing stability.

[0210] Optionally, the magnetic coupling acting force is set such that when the minimum distance between the sound generating part 100 and the abutting part 400 increases from 3.8 mm to 5.5 mm, the change amount of the magnetic coupling acting force is greater than or equal to 20 gf. Such a setting can make the change amount of the magnetic coupling acting force relatively large, so that the change amount of the elastic acting force can be relatively small, and thus the elastic coefficient of the earhook 300 can be set relatively small, which is beneficial to improving the wearing stability and reliability of the earphone 1.

[0211] Optionally, as Figure 34As shown, the earhook 300 includes an elastic sheet 301. The two ends of the elastic sheet 301 in its length direction are relatively fixed to the sound generating part 100 and the abutting part 400 respectively. The ratio of the width W31 to the thickness K31 of the elastic sheet 301 is 8 to 12, and can be, for example, 9, 10, 11, etc. In some embodiments, the width W31 of the elastic sheet 301 is between 1 and 3 mm, for example, it can be 2 mm, and the thickness K31 is between 0.1 and 0.3 mm, for example, it can be 0.15 mm, 0.2 mm, 0.25 mm, etc.

[0212] By providing the elastic sheet 301 to provide an elastic force, the clamping and wearing of the earphone 1 are realized. By reasonably setting the ratio of the width to the thickness, while ensuring that the earhook 300 has sufficient strength, the requirement of the elastic force is satisfied, so that the earphone 1 has both wearing comfort and wearing stability. In addition, reasonably setting the width and thickness of the elastic sheet 301 can reduce the torque received by the elastic sheet 301, prevent torsion, and make the change of the provided elastic force more linear, effectively improving the wearing comfort. The elastic sheet 301 can be, for example, a titanium sheet, and its exterior is coated with a flexible material, such as silicone, rubber, elastic resin, polyurethane material, polydimethylsiloxane, PVC, TPE and other materials, to improve the wearing comfort.

[0213] Optionally, the earphone 1 further includes a flexible printed circuit board (FPC). Among them, the flexible printed circuit board is arranged along the length direction of the elastic sheet 301 and is disposed on the elastic sheet 301. Based on this, the wiring difficulty on the earphone 1 can be effectively reduced. For example, the FPC can extend approximately along the upper surface or the lower surface of the elastic sheet 301. Plug-in blocks 2332 can be provided at both ends of the elastic sheet 301, and the plug-in blocks 2332 at both ends can be respectively plugged and connected to the sound generating part 100 and the abutting part 400. The elastic sheet 301 is provided with a notch 2330 that penetrates to the side edge of the elastic sheet 301 in the width direction at a position close to the plug-in block 2332. This notch 2330 is convenient for sealing glue and makes the injection molding effect better.

[0214] Optionally, as Figure 35 shown, the earphone 1 has a reference cross-section SF. The reference cross-section is set along the length direction of the earhook 300. Among them, in the wearing state, the reference cross-section is nearly parallel to the human horizontal plane. In the reference cross-section, the earhook 300, the sound generating part 100 and the abutting part 400 have an inner contour, and at least the reference point C, the reference point E and the reference point H are included on the inner contour.

[0215] In the worn state, reference point C is a reference point located on the inner contour of the earhook 300 and corresponding to the helix edge (e.g., the topmost / outermost edge of the helix), and reference point C can be a turning point of the inner contour. For example, the inner contour 300 is a contour line that protrudes away from the helix E17 as a whole. The radius of curvature of a part of the inner contour 300 in the vicinity of the helix edge gradually increases, then gradually decreases, and then gradually increases starting from reference point C towards the sound generating part 300 and the abutting part 400 respectively.

[0216] In some embodiments, in the natural state, there is no abutment between the outer wall surface of the sound generating part 210 and the outer wall surface of 400. There is a position with the shortest distance between the outer wall surface of the sound generating part 100 and the outer wall surface of the abutting part 400, and the midpoint of the connection line between the two positions with the shortest distance is point O. If there is an abutment between the outer wall surface of the sound generating part 210 and the outer wall surface of 400 in the natural state, then the length of the shortest connection line between the outer wall surface of the sound generating part 210 and the outer wall surface of 400 is nearly 0. At this time, reference point O should be the midpoint of the arc formed corresponding to the abutting area where the outer wall surface of the sound generating part 210 abuts against the outer wall surface of 400. Reference point C is the reference point in the inner contour with the largest distance from point O. Reference point L is the position point on the sound generating part 100 that is closest to reference point C. Reference point K is the position point on the sound generating part 100 that is farthest from reference point C.

[0217] Optionally, as Figure 35 shown, a connection line CE is formed between reference point C and reference point E, and a connection line CH is formed between reference point C and reference point H. In the natural state, the length of the connection line CE is between 16 - 19 mm, the length of the connection line CH is between 6.5 - 9.0 mm, the included angle between the connection line CE and the connection line CH is between 72° - 88°, the inner contour between reference point C and reference point E is located outside the connection line CE, and the inner contour between reference point C and reference point H is located outside the connection line CH.

[0218] In the experience of wearing and using the earclip - type earphone 1, if the inner contour of the earphone 1 contacts the helix, it will greatly affect the wearing comfort of the earphone 1 during long - term use and affect the user experience of the wearer.

[0219] Among them, if the angle between the connecting line CE and the connecting line CH is too small, it will cause the inner contour of the earphone 1, especially the inner contour between the reference point C and the reference point E and the inner contour between the reference point C and the reference point H, not to bypass the helix as much as possible. If it is too large, it will increase the overall structural size of the earphone 1 and affect the overall aesthetics of the earphone 1. Therefore, the angle between the connecting line CE and the connecting line CH is set within the range of 72° to 88°, so as to ensure that the inner contour of the earphone 1 can bypass the helix as much as possible, reduce the contact between the inner contour of the earphone 1 and the helix, and thus effectively improve the wearing comfort and aesthetics of the earphone 1. For example, in some embodiments, the angle between the connecting line CE and the connecting line CH can be set to 80°.

[0220] Further, if the length of the connecting line CE is too small, the sound generating part 100 cannot extend into the concha cavity, which will affect the sound quality of the earphone 1. Or after the sound generating part 100 extends into the concha cavity, the inner contour of the earphone 1, especially the position at the reference point C, contacts the helix. If it is too large, it will increase the overall structural size of the earphone 1 and affect the aesthetics of the earphone 1. Therefore, the length of the connecting line CE is set within the range of 16 to 19 mm, which can ensure that the sound generating part 100 extends into the concha cavity stably, and at the same time ensure that the inner contour and the sound generating part 100 do not contact the helix E17, so as to effectively improve the wearing comfort and aesthetics of the earphone 1200, and at the same time effectively improve the sound transmission quality of the earphone 1. Further, if the length of the connecting line CH is too small, the abutting part 400 will contact the helix. If it is too large, it will increase the overall structural size of the earphone 1 and affect the aesthetics of the earphone 1. Therefore, the length of the connecting line CH is set to 6.5 to 9.0 mm, which can better ensure that the inner contour of the earphone 1 can bypass the helix as much as possible, so as to ensure that the inner contour and the abutting part 400 of the earphone 1 do not contact the helix, and thus effectively improve the wearing comfort of the earphone 1. For example, in some embodiments, the length of the connecting line CE is set to 17.13 mm, and the length of the connecting line CH is set to 7.59 mm.

[0221] Optionally, the arc-chord ratio of the inner contour between the reference point C and the reference point E is between 1.02 and 1.20. Optionally, the arc-chord ratio of the inner contour between the reference point C and the third reference point H is between 1.05 and 1.23.

[0222] Specifically, the arc-chord ratio of the inner contour between the reference point C and the reference point H specifically refers to the ratio of the actual length of the inner contour between the reference point C and the reference point H to the length of the connecting line CE. For example, in some embodiments, the inner contour is a curved arc-shaped curve contour, and the arc ratio of the inner contour between the reference point C and the reference point E is the ratio of the arc length of the inner contour between the reference point C and the reference point E to the length of the connecting line CE. It should be noted that in this embodiment, the inner contour between the reference point C and the reference point E of the inner contour is a continuous arc protruding away from the connecting line CE. In other embodiments, the inner contour may not be set as a curve, and it may also be a multi-segment broken line, etc.

[0223] Among them, if the arc chord ratio of the inner contour between the reference point C and the reference point E is too small, the inner contour between the reference point C and the reference point E will be relatively straight, which is not conducive to the inner contour between the reference point C and the reference point E bypassing the helix. If the arc chord ratio of the inner contour between the reference point C and the reference point E is too large, it will cause the inner contour between the reference point C and the reference point E to be too curved, affecting the overall aesthetics of the earphone 1. Therefore, the arc chord ratio of the inner contour between the reference point C and the reference point E is set within the range of 1.02 to 1.20, so that the inner contour between the reference point C and the reference point E can bypass the helix as much as possible without contacting the helix, thereby effectively improving the wearing comfort of the earphone 1 while effectively improving the aesthetics of the earphone 10. For example, in some embodiments, the arc chord ratio between the reference point C and the reference point E can be set to 1.1.

[0224] Optionally, between the reference point L and the reference point K and on the side facing the abutting portion 400, the arc chord ratio of the outer wall surface of the sound generating portion 100 is between 1.4 and 1.7. Based on this setting, the side of the sound generating portion 100 facing the abutting portion 400 tends to be more spherical. Among them, between the reference point L and the reference point K and on the side facing the abutting portion 400, the outer wall surface of the sound generating portion 100 is a continuous arc surface protruding toward the abutting portion 400. For example, in some embodiments, between the reference point L and the reference point K and on the side facing the abutting portion 400, the arc chord ratio of the outer wall surface of the sound generating portion 100 can be set to 1.64.

[0225] Optionally, a connection line CL is formed between the reference point C and the reference point L, the connection line CL is located between the connection line CE and the connection line CH, the length of the connection line CL is between 13 and 17 mm, and the included angle between the connection line CL and the connection line CE is between 15° and 27°.

[0226] Specifically, the reference point L is a special point on the sound generating portion 100 that is closest to the reference point C. Therefore, the included angle between the connection line CL and the connection line CE determines to a certain extent whether the sound generating portion 100 can be fully placed in the concha cavity, and the length of the connection line CL determines to a certain extent whether the inner contour of the earphone 1 can still not contact the helix when the sound generating portion 100 is fully placed in the concha cavity 1. Therefore, the length of the connection line CL is set between 13 and 17 mm, and the included angle between the connection line CL and the connection line CE is set between 15° and 27°. Based on this, on the premise that the inner contour does not contact or squeeze the helix, the sound generating portion 100 can still be fully placed in the concha cavity, thereby effectively improving the wearing comfort of the earphone 1 while effectively improving the sound transmission quality of the earphone 1. For example, in some embodiments, the length of the third connection line is set to 15 mm, and the included angle between the connection line CL and the connection line CE is set to 21°.

[0227] Optionally, a connecting line CK is formed between the reference point C and the reference point K. The connecting line CK is located between the connecting line CE and the connecting line CH. The length of the connecting line CK ranges from 24 to 30 mm, and the angle between the connecting line CK and the connecting line CE ranges from 13° to 25°.

[0228] When the earphone 1 is in a worn state, the reference point K is closest to the ear canal. If the reference point K is too close to the ear canal, the ear canal will be blocked, affecting the user experience. If the reference point K is too far from the ear canal, the sound transmission effect of the earphone 1 will be affected. Therefore, the length of the connecting line CK is set in the range of 24 to 30 mm, and the angle between the connecting line CK and the connecting line CE is set in the range of 13° to 25°. Based on this, when the sound generating part 100 extends into the concha, the area of the sound generating part 100 near the reference point K can maintain a relatively appropriate distance from the ear canal, effectively preventing the sound generating part 100 from blocking the ear canal and effectively improving the sound transmission effect of the earphone 1. For example, in some embodiments, the length of the connecting line CK can be set to 27.7 mm, and the angle between the connecting line CK and the connecting line CE can be set to 20°.

[0229] Optionally, as Figure 35 shown, along the inner contour, there is an arc segment T1T2 between two points on both sides of the reference point C and 6 mm away from the reference point C respectively. The arc chord ratio of the arc segment T1T2 ranges from 1.03 to 1.10. Such a setting can effectively reduce stress concentration, effectively improve the service life and reliability of the ear hook 300, and is beneficial to ensuring the wearing stability of the earphone 300.

[0230] The above are only some embodiments of the present application, and thus do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A headset, characterized in that: The earphone includes a sound-emitting part, and the sound-emitting part includes: A first shell, used to form a first accommodating cavity; A sound-emitting component is arranged in the first accommodating cavity, the sound-emitting component includes two speakers, each of the speakers includes a diaphragm, the two speakers are assembled and matched with each other along the axial direction to form a first acoustic cavity between the two speakers, the sound-emitting component and the first shell cooperate with each other to form a second acoustic cavity isolated from the first acoustic cavity between the sound-emitting component and the first shell, the first shell is provided with a sound outlet hole connected to the first acoustic cavity and a pressure relief hole connected to the second acoustic cavity, the sound generated on one side of the diaphragms of the two speakers is output through the first acoustic cavity and the sound outlet hole, and the sound generated on the other side of the diaphragms of the two speakers is output through the second acoustic cavity and the pressure relief hole.

2. The earphone according to claim 1, characterized in that The two speakers have the same acoustic characteristics and are coaxially arranged along the axis direction.

3. The earphone according to claim 1, characterized in that The sound-generating component also includes a mounting bracket, which is arranged in a ring shape. The two speakers are respectively assembled and matched with the two ends of the mounting bracket to form the first acoustic cavity. The mounting bracket is provided with a first sound-introducing hole connecting the sound outlet hole and the first acoustic cavity.

4. The earphone according to claim 3, characterized in that: The two speakers respectively include a voice coil, a magnetic circuit system and a basin frame, the basin frame is used to support the diaphragm and the magnetic circuit system, the voice coil is connected to the diaphragm, and is arranged in the magnetic field formed by the magnetic circuit system, and the basin frames of the two speakers are respectively assembled and matched with the mounting bracket.

5. The earphone according to claim 1, characterized in that The two speakers respectively include a voice coil, a magnetic circuit system and a basin frame, the basin frame is used to support the diaphragm and the magnetic circuit system, the voice coil is connected to the diaphragm, and is arranged in the magnetic field formed by the magnetic circuit system, the basin frames of the two speakers are assembled and matched with each other to form the first acoustic cavity, and the basin frame on at least one of the two speakers is provided with a first sound inlet hole connecting the sound outlet hole and the first acoustic cavity.

6. The earphone according to claim 4 or 5, characterized in that: The diaphragms of the two speakers are arranged adjacent to each other on a side away from the respective magnetic circuit systems, and the first acoustic cavity is formed between the diaphragms of the two speakers.

7. The earphone according to claim 6, characterized in that The sound outlet hole and the first sound guide hole are connected to each other along the radial direction of the sound generating component, the sound outlet hole and the first sound guide hole are respectively arranged in a strip shape, and the length directions of the sound outlet hole and the first sound guide hole are arranged along the circumferential direction of the sound generating component.

8. The earphone according to claim 7, characterized in that: The spacing distance between the mounting edges of the diaphragms of the two speakers along the axial direction is between 1.6 and 2.5 mm, the radial dimension of the first acoustic cavity is between 7.5 and 9.5 mm, and the area of ​​the sound outlet and the first sound guide hole is between 5 and 18 mm. 2 .

9. The earphone according to claim 6, characterized in that The basin frames of the two speakers are respectively provided with second sound-introducing holes, and the second sound-introducing holes connect the side of the corresponding diaphragm facing the respective magnetic circuit systems with the second acoustic cavity.

10. The earphone according to claim 9, characterized in that The diaphragms of the two speakers share the second acoustic cavity and the pressure relief hole on the sides facing the respective magnetic circuit systems.

11. The earphone according to claim 9, characterized in that The second acoustic cavity includes two sub-acoustic cavities isolated from each other, the first shell is provided with the pressure relief holes respectively connected with each of the sub-acoustic cavities, and the diaphragms of the two speakers are respectively connected with the corresponding sub-acoustic cavities and the pressure relief holes on one side facing the respective magnetic circuit systems.

12. The earphone according to claim 9, characterized in that There are multiple second sound-introducing holes, which are spaced apart along the circumference of the sound-generating component. The basin frame is provided with a welding pad located between two of the second sound-introducing holes, wherein the distance from some of the second sound-introducing holes to the pressure relief hole is smaller than the distance from the welding pad to the pressure relief hole.

13. The earphone according to claim 12, characterized in that The distance from some of the second sound-inlet holes to the pressure relief holes is no more than 0.5 mm.

14. The earphone according to claim 12, characterized in that The second sound guide hole which is most adjacent to the pressure relief hole is arranged opposite to the welding pad along the radial direction of the sound generating component.

15. The earphone according to claim 6, characterized in that One end of the magnetic circuit system away from the respective diaphragms protrudes from the basin frame, and the radial dimension of the protruding portion of the magnetic circuit system relative to the basin frame is smaller than the radial dimension of the supporting position of the basin frame for the diaphragm.

16. The earphone according to claim 15, characterized in that The ratio of the axial dimension of the sound-generating component to the radial dimension of the supporting position of the basin frame for the diaphragm is between 0.8 and 1.

3.

17. The earphone according to claim 4 or 5, characterized in that: The sound-generating component is provided with a mounting boss, the first sound-introducing hole is provided on the mounting boss, and the mounting boss abuts against the first shell at the periphery of the sound-emitting hole, so that the first sound-introducing hole and the sound-emitting hole are isolated from the second acoustic cavity; or, The first shell is provided with a mounting boss, the sound outlet hole is provided on the mounting boss, and the mounting boss abuts against the sound generating component at the periphery of the first sound introduction hole so that the first sound introduction hole and the sound outlet hole are isolated from the second acoustic cavity.

18. The earphone according to claim 17, characterized in that The sound-emitting component also includes a mounting bracket, the mounting boss is located on the mounting bracket, the mounting bracket also includes a bracket body connected to the mounting boss along the circumference of the sound-emitting component and arranged in a ring-notch shape, the bracket body is provided with two first supporting surfaces opposite to each other along the axial direction, the outer end surfaces of the two basins close to the side of each diaphragm are respectively supported on the corresponding first supporting surfaces, the mounting bosses protrude from the bracket body along the axial direction and the radial direction of the sound-emitting component, and are arranged on the outside of the outer circumferential surfaces of the two basins.

19. The earphone according to claim 18, characterized in that The bracket body includes a supporting portion and a limiting portion, the limiting portion is connected to the supporting portion, the first supporting table surface is arranged on the supporting portion, the limiting portion protrudes from the first supporting table surface along the axial direction, and is embedded in the basin frame to limit the basin frame along the radial direction of the sound-emitting component; or the bracket body is provided with a recessed portion, and part of the basin frame is embedded in the recessed portion to limit the basin frame along the radial direction of the sound-emitting component.

20. The headset according to claim 19, characterized in that Sealant is provided between the outer end surfaces of the two basin frames and the first supporting table surface, and between the inner peripheral surface of the mounting boss and the outer peripheral surfaces of the two basin frames.

21. The earphone according to claim 20, characterized in that The basin frame is provided with a first cut angle at a corner near the connection position between the outer circumferential surface of the limiting portion and the first supporting table surface to form a first glue containing groove, and the supporting portion is provided with a second cut angle at a corner near the connection position between the outer end surface of the basin frame and the outer circumferential surface of the basin frame to form a second glue containing groove.

22. The headset according to claim 21, characterized in that The mounting boss is provided with a third cut corner at a corner close to the outer peripheral surface of the two basin frames to form a third glue containing groove.

23. The earphone according to claim 21, characterized in that The second cut corner and the third cut corner are connected to each other.

24. The headset according to claim 19, characterized in that The basin frame is also provided with a second supporting surface, which is located on the inner side of the outer end surface of the basin frame along the radial direction of the sound-emitting component, and is spaced apart from the outer end surface of the basin frame along the axial direction. The mounting edge of the diaphragm is supported on the second supporting surface, and the projection of the limiting portion along the axial direction at least partially falls on the second supporting surface.

25. The headset according to claim 18, characterized in that The mounting bracket is a plastic molded part, the radial thickness of the mounting boss is between 0.2 and 0.7 mm, the mounting boss includes a connecting bridge arranged along the width direction of the first sound guide hole and connecting the long side hole edge of the first sound guide hole, and the first sound guide hole is divided by the connecting bridge into at least two first sub-sound guide holes spaced from each other along the length direction of the first sound guide hole.

26. The earphone according to any one of claims 1 to 25, characterized in that: The two basin frames are respectively provided with welding pads and sound guide holes which are arranged at intervals from each other along the circumference of the sound-generating component, and the sound guide holes connect the side of the corresponding diaphragm facing the respective magnetic circuit system with the second acoustic cavity; Each of the basin frames and the mounting bracket is provided with a limiting structure that cooperates with each other, and the limiting structure is used to limit the basin frame and the mounting bracket along the circumference of the sound-emitting component. The limiting structures of the two basin frames are arranged relatively along the axial direction, and the sound-emitting component has a radial plane arranged along the axial direction and passing through the limiting structure. The welding pad on each basin frame is mirror-set relative to the radial plane, and the sound-introducing holes on each basin frame are respectively mirror-symmetrical relative to the radial plane.

27. The earphone according to claim 17, characterized in that The earphone also includes an ear hook and a butt joint, the ear hook is connected to the sound-emitting part and the butt joint, and when worn, the sound-emitting part and the butt joint form a clamping state on both sides of the user's auricle, and the sound-emitting part is located in the concha cavity, the first shell includes a first hard shell and a second hard shell, the first hard shell is connected to the ear hook, the first hard shell and the second hard shell enclose the first accommodating cavity, and the sound outlet is arranged on the second hard shell.

28. The headset according to claim 27, characterized in that The second hard shell is provided with a protrusion protruding relative to the end surface of the second hard shell, and the first hard shell is provided with a groove recessed relative to the end surface of the first hard shell. The protrusion is embedded in the groove, and the sound outlet portion is provided on the protrusion.

29. The earphone according to claim 27, characterized in that The mounting boss is located in the second hard shell or the sound-emitting component; a third supporting surface is arranged in the first hard shell, and the third supporting surface is used to support the sound-emitting component so that when the first hard shell and the second hard shell are fixed to each other, the sound-emitting component and the second hard shell abut against each other through the mounting boss.

30. The earphone according to claim 29, characterized in that When the sound-generating component and the second hard shell are in abutment with each other through the mounting boss, the end surface of the first hard shell and the end surface of the second hard shell maintain a certain gap along the abutment direction of the sound-generating component and the second hard shell.

31. The earphone according to claim 29, characterized in that The axial direction is perpendicular to the abutment direction of the sound-emitting component and the second hard shell, the two speakers respectively include a voice coil, a magnetic circuit system and a basin frame, the basin frame is used to support the diaphragm and the magnetic circuit system, the voice coil is connected to the diaphragm, and is arranged in the magnetic field formed by the magnetic circuit system, the diaphragms of the two speakers are arranged adjacent to each other on the side away from their respective magnetic circuit systems, the first acoustic cavity is formed between the diaphragms of the two speakers, the magnetic circuit system includes a magnetic cover protruding from the basin frame and a magnet arranged in the magnetic cover, and the third support table is arranged to support the magnetic covers of the two speakers respectively.

32. The headset according to claim 1, characterized in that The earphone also includes a butt joint portion and an ear hook, wherein the ear hook connects the sound-emitting portion and the butt joint portion, and when worn, the sound-emitting portion and the butt joint portion form a clamping state on both sides of the user's auricle, and the sound-emitting portion is located in the concha cavity, wherein the sound outlet hole and the pressure relief hole are respectively arranged in a mirror-symmetrical manner with respect to a symmetry plane arranged along the length direction of the ear hook.

33. The earphone according to claim 32, characterized in that On the symmetric plane, the minimum spacing distance between the sound outlet hole and the pressure relief hole is between 6.5 mm and 10 mm.

34. The earphone according to claim 32, characterized in that On the symmetry plane, the pressure relief hole is arranged toward the helix, and the sound outlet hole and the pressure relief hole are separated from each other by a contact area between the first shell and the ear.

35. The earphone according to claim 32, characterized in that The number of the sound outlet hole is one and the sound outlet hole is arranged in a strip shape. The symmetry plane is arranged along the length direction of the sound outlet hole and is perpendicular to the axis direction.

36. The earphone according to claim 32, characterized in that The number of the pressure relief hole is one and they are arranged in a strip shape. The symmetry plane is arranged along the width direction of the pressure relief hole and is perpendicular to the axis direction.

37. The earphone according to claim 36, characterized in that The pressure relief hole includes a first hole portion and a second hole portion along the length direction of the pressure relief hole, and a third hole portion connected between the first hole portion and the second hole portion, wherein the width of at least some positions of the first hole portion and the second hole portion is greater than the width of the third hole portion.

38. The earphone according to claim 32, characterized in that The symmetry plane is the symmetry plane of the ear hook.

39. The headset according to claim 1, characterized in that The earphone also includes an ear hook and a butt joint, the ear hook connects the sound-emitting part and the butt joint, and in a worn state, the sound-emitting part and the butt joint form a clamping state on both sides of the user's auricle, and the sound-emitting part is located in the concha cavity, the first shell includes a first hard shell, a second hard shell and a first flexible body, the first hard shell and the second hard shell are enclosed to form the first accommodating cavity, the first flexible body is arranged on the outer wall of the second hard shell and is used to contact the concha cavity, the plane where the outermost loop line of the end face of the first flexible body is located is the first reference plane, the midpoint of the sound-emitting component along the axis or the axis of the sound-emitting component is located on the side of the first reference plane facing the first hard shell and is parallel to the first reference plane.

40. The earphone according to claim 39, characterized in that The distance between the midpoint of the sound-generating component along the axis or the axis and the first reference surface is between 0.4 and 4 mm.

41. The earphone according to claim 39, characterized in that The sound-generating part is configured to maintain at least a portion of the ear opening in the concha cavity.

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